https://docs.analytica.com/api.php?action=feedcontributions&feedformat=atom&user=CclermontAnalytica Docs - User contributions [en]2026-05-20T13:44:11ZUser contributionsMediaWiki 1.35.9https://docs.analytica.com/index.php?title=Analytica_Cloud_Platform_(ACP)&diff=60812Analytica Cloud Platform (ACP)2024-05-03T14:38:45Z<p>Cclermont: </p>
<hr />
<div>[[Category:Analytica User Guide]]<br />
[[Category: Analytica Cloud Platform]]<br />
<breadcrumbs>Analytica User Guide > User Interfaces for End Users> {{PAGENAME}}</breadcrumbs><br />
<br><br />
You can make an Analytica model accessible via a web browser in a few seconds by publishing it to the [[Analytica Cloud Platform]] (ACP). <br />
<br><br><br />
Collaborators and end users can then view and run the model on the web. Key advantages of ACP are that:<br />
* End users don't have to install Analytica or any other software on their computer, and can access it from non-Windows computers. <br />
* They can modify inputs to define their own scenarios and generate result tables and graphs.<br />
* After you upload your model to ACP, you can simply email your end-users an invitation with a URL link to view the model.<br />
<br />
==ACP Account types==<br />
<br />
Every copy of Analytica on the desktop comes with a free ACP account. We offer these kinds of ACP accounts:<br />
<br />
* '''ACP individual account''': You get 25 free sessions with [[Analytica Free Edition]] or Analytica with expired support. If you have a paid Analytica license with active support, you get 25 user sessions per month. You can buy more session credits [https://analytica.com/purchase-analytica/ online]. <br />
<br />
* '''ACP Group Plan''' lets a group of up to 5 modelers collaborate, share models, and provide them to end users. As a member of a Group Plan, you can save changes to model inputs as a snapshot so that you can modify and run it over multiple sessions. You can organize models into '''Project Directories'''. Group members may have different levels of access for each Project Directory: '''Reviewer access''' lets you run models; '''Author access''' lets you upload or edit models; '''Manager access''' lets you add new members or modify their access. '''Admin access''' is a Manager, which can also add or delete projects, and delete users.<br />
<br />
* '''ACP Premium Group Plan''' extends the basic Group Plan up to 12 users, more sessions, more CPU time per session, and supports models that use the [[Analytica Optimizer Guide|Optimizer]]. <br />
<br />
* '''ACP Server license'" lets you install ACP on a dedicated server for your organization. The number of users, sessions, and computational time is limited only by the configuration of your server. A dedicated ACP Server can provide a higher level of security for sensitive data and models.<br />
<br />
To see prices or buy a Group Plan, see [https://analytica.com/purchase-analytica/ Analytica.com].<br />
<br />
==Publish to ACP==<br />
<br />
To publish a model to ACP, open the model in Analytica, then select [[File menu|File]] &rarr; '''Publish to cloud...'''.<br />
<br />
If you already have an ACP account set up, it shows this dialog with the '''Publish model''' tab (see below to Set up an account):<br />
<br />
:[[File:Chapter9_23.png]]<br />
<br />
You can optionally change ACP model name from your local file name -- useful if you want to keep several local file revisions, or want to publish different revisions. When you press '''Publish''', it uploads the model to the ACP server. You have three options for what happens once the upload completes:<br />
<br />
* Open ACP model folder page<br />
* Open model in ACP<br />
* Do nothing<br />
<br />
Opening the model in ACP consumes a session credit, while viewing the model folder page does not. From the folder page, you have the option of launching the model.<br />
<br />
You can also jump to the ACP model folder page by selecting [[File menu|File]] &rarr; '''Manage published models...'''.<br />
<br />
'''To Set up an ACP account''': The first time you select '''Publish to cloud...''', it opens the dialog showing the '''Configure account '''tab.<br />
<br />
:[[File:Chapter9_24.png]]<br />
<br />
Click the [https://www.analyticacloud.com/acp/Signup/acpIndividualSignup.aspx sign up] link for a free ACP individual account in a web browser. You will get account information to enter in this dialog. Then press '''OK'''. For detailed steps on signing up for an ACP account, see [[Tutorial: Sharing a model with ACP#Analytica_Cloud_Platform_.28ACP.29|Analytica Cloud Platform (ACP)]] in the [[Analytica Tutorial]].<br />
<br />
== Designing models for ACP ==<br />
<br />
You can upload and run any Analytica model via a web browser with ACP. But, here are some guidelines to design a user interface to work well as a web application. ACP also offers some user interface options not yet available in Analytica on the desktop, such as a tab-based interface, where each module in the main model is accessible via a tab.<br />
<br />
'''Limit computation times''': People expect each operation in a web application to complete quickly. When operations take more than a minute or so, users may give up and leave the page. Normally, ACP enforces a 60 second maximum compute time for each step. (If you have an ACP Group Account, you can modify this.) The Lumina-hosted ACP server is shared by many users. It is not a super computer, and is not intended for computationally intensive models. <br />
<br />
'''Use small diagrams''': Even people with large screens often narrower web browser windows. We recommend that you don't design a web app that needs more than 1200 pixels wide. ACP shows scroll bars if the window is wider than fits in the browser window, but that doesn't make for a great user experience. You can achieve this by organizing a large model into a hierarchy of modules, each with not more than about 20 nodes.<br />
<br />
'''Single window design''': Analytica on the desktop lets you have multiple windows open simultaneously, side-by-side or overlapping. This gives lots of flexibility to display and arrange information. ACP shows only a single diagram (or result or object view), plus an Outline view on the left -- and you can expand a view in ACP by [[Embed table or graph with ACP | embedding tables and graphs in a diagram]] using Tall nodes or Frame nodes. <br />
<br />
'''Navigation styles''': ACP provides some [[ACP Style Library#Navigation styles| layout options]] that are not (yet) available in Analytica. These include tabbed module navigation, embedded tables and graphs, an outline tree or hierarchy header, control over what surrounding interface components display, and visual styles for diagram nodes.<br />
<br />
:[[File:Chapter9_25a.png|600px]]<br />
<br />
The full set of layout options and how to specify the settings are beyond the scope of this manual. The reference guide for these is on the Analytica Docs, see [[AcpStyles]], [[ACP Rendering tables and graphs on the diagram]], and [https://docs.analytica.com/index.php?title=What%27s_new_in_ACP%3F What's new in ACP].<br />
<br />
'''ACP Style Library''' '''makes it easy '''to select most navigation options and display settings in ACP. The Style Library is packaged as an Analytica library file, which you add to your model, then access the control panels by opening the library diagrams from within Analytica.<br />
<br />
You can make use of the styles without using the Style Library. Styles are specified in the AcpStyles attribute, as described at [[AcpStyles]]. However, the Style Library makes these far easier to use.<br />
<br />
See also the instructions for obtaining the latest version of the [[ACP Style Library]], and for using it.<br />
<br />
<iframe width="560" height="315" src="https://www.youtube.com/embed/uUAk4TwrOAw" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><br />
<br />
==Summary==<br />
'''Analytica Cloud Platform''' (ACP) is a convenient way to share models over the internet, and is usable by people who have not installed any edition of Analytica, as well as people on non-Window’s platforms. ACP accounts are free, and a moderate level of usage is free as long as you keep your support active.<br />
<br />
When sharing models from the Cloud Platform, additional stylistic considerations are important for providing users of your model with a satisfactory browser-based experience. These include limiting evaluation times, keeping diagrams small, and making effective use of diagram real estate through embedded tables and graphs, tabbed panes and hierarchy headers. The Style Library provides an interface for selecting ACP styles.<br />
<br />
==See Also==<br />
* [[Analytica Cloud Platform]] More in-depth information.<br />
* [[Tutorial: Sharing a model with ACP]]<br />
* [[Model Licensing]]<br />
* [[Editions of Analytica]]<br />
* [[What's new in ACP?]]<br />
* [[ACP Style Library]]<br />
* [[AcpStyles]]<br />
<br />
<br />
<footer>User Interfaces for End Users / {{PAGENAME}} / Arrays and Indexes</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Analytica_Cloud_Platform_(ACP)&diff=60811Analytica Cloud Platform (ACP)2024-05-03T14:18:13Z<p>Cclermont: /* ACP Account types */</p>
<hr />
<div>[[Category:Analytica User Guide]]<br />
[[Category: Analytica Cloud Platform]]<br />
<breadcrumbs>Analytica User Guide > User Interfaces for End Users> {{PAGENAME}}</breadcrumbs><br />
<br />
You can make an Analytica model accessible via a web browser in a few seconds by publishing it to the [[Analytica Cloud Platform]] (ACP). Collaborators and end users can then view and run the model on the web. Key advantages of ACP are that:<br />
* End users don't have to install Analytica or any other software on their computer, and can access it from non-Windows computers. <br />
* They can modify inputs to define their own scenarios and generate result tables and graphs.<br />
* After you upload your model to ACP, you can simply email your end-users an invitation with a URL link to view the model.<br />
<br />
==ACP Account types==<br />
<br />
Every copy of Analytica on the desktop comes with a free ACP account. We offer these kinds of ACP accounts:<br />
<br />
* '''ACP individual account''': You get 25 free sessions with [[Analytica Free Edition]] or Analytica with expired support. If you have a paid Analytica license with active support, you get 25 user sessions per month. You can buy more session credits [https://analytica.com/purchase-analytica/ online]. <br />
<br />
* '''ACP Group Plan''' lets a group of up to 5 modelers collaborate, share models, and provide them to end users. As a member of a Group Plan, you can save changes to model inputs as a snapshot so that you can modify and run it over multiple sessions. You can organize models into '''Project Directories'''. Group members may have different levels of access for each Project Directory: '''Reviewer access''' lets you run models; '''Author access''' lets you upload or edit models; '''Manager access''' lets you add new members or modify their access. '''Admin access''' is a Manager, which can also add or delete projects, and delete users.<br />
<br />
* '''ACP Premium Group Plan''' extends the basic Group Plan up to 12 users, more sessions, more CPU time per session, and supports models that use the [[Analytica Optimizer Guide|Optimizer]]. <br />
<br />
* '''ACP Server license'" lets you install ACP on a dedicated server for your organization. The number of users, sessions, and computational time is limited only by the configuration of your server. A dedicated ACP Server can provide a higher level of security for sensitive data and models.<br />
<br />
To see prices or buy a Group Plan, see [https://analytica.com/purchase-analytica/ Analytica.com].<br />
<br />
==Publish to ACP==<br />
<br />
To publish a model to ACP, open the model in Analytica, then select [[File menu|File]] &rarr; '''Publish to cloud...'''.<br />
<br />
If you already have an ACP account set up, it shows this dialog with the '''Publish model''' tab (see below to Set up an account):<br />
<br />
:[[File:Chapter9_23.png]]<br />
<br />
You can optionally change ACP model name from your local file name -- useful if you want to keep several local file revisions, or want to publish different revisions. When you press '''Publish''', it uploads the model to the ACP server. You have three options for what happens once the upload completes:<br />
<br />
* Open ACP model folder page<br />
* Open model in ACP<br />
* Do nothing<br />
<br />
Opening the model in ACP consumes a session credit, while viewing the model folder page does not. From the folder page, you have the option of launching the model.<br />
<br />
You can also jump to the ACP model folder page by selecting [[File menu|File]] &rarr; '''Manage published models...'''.<br />
<br />
'''To Set up an ACP account''': The first time you select '''Publish to cloud...''', it opens the dialog showing the '''Configure account '''tab.<br />
<br />
:[[File:Chapter9_24.png]]<br />
<br />
Click the [https://www.analyticacloud.com/acp/Signup/acpIndividualSignup.aspx sign up] link for a free ACP individual account in a web browser. You will get account information to enter in this dialog. Then press '''OK'''. For detailed steps on signing up for an ACP account, see [[Tutorial: Sharing a model with ACP#Analytica_Cloud_Platform_.28ACP.29|Analytica Cloud Platform (ACP)]] in the [[Analytica Tutorial]].<br />
<br />
== Designing models for ACP ==<br />
<br />
You can upload and run any Analytica model via a web browser with ACP. But, here are some guidelines to design a user interface to work well as a web application. ACP also offers some user interface options not yet available in Analytica on the desktop, such as a tab-based interface, where each module in the main model is accessible via a tab.<br />
<br />
'''Limit computation times''': People expect each operation in a web application to complete quickly. When operations take more than a minute or so, users may give up and leave the page. Normally, ACP enforces a 60 second maximum compute time for each step. (If you have an ACP Group Account, you can modify this.) The Lumina-hosted ACP server is shared by many users. It is not a super computer, and is not intended for computationally intensive models. <br />
<br />
'''Use small diagrams''': Even people with large screens often narrower web browser windows. We recommend that you don't design a web app that needs more than 1200 pixels wide. ACP shows scroll bars if the window is wider than fits in the browser window, but that doesn't make for a great user experience. You can achieve this by organizing a large model into a hierarchy of modules, each with not more than about 20 nodes.<br />
<br />
'''Single window design''': Analytica on the desktop lets you have multiple windows open simultaneously, side-by-side or overlapping. This gives lots of flexibility to display and arrange information. ACP shows only a single diagram (or result or object view), plus an Outline view on the left -- and you can expand a view in ACP by [[Embed table or graph with ACP | embedding tables and graphs in a diagram]] using Tall nodes or Frame nodes. <br />
<br />
'''Navigation styles''': ACP provides some [[ACP Style Library#Navigation styles| layout options]] that are not (yet) available in Analytica. These include tabbed module navigation, embedded tables and graphs, an outline tree or hierarchy header, control over what surrounding interface components display, and visual styles for diagram nodes.<br />
<br />
:[[File:Chapter9_25a.png|600px]]<br />
<br />
The full set of layout options and how to specify the settings are beyond the scope of this manual. The reference guide for these is on the Analytica Docs, see [[AcpStyles]], [[ACP Rendering tables and graphs on the diagram]], and [https://docs.analytica.com/index.php?title=What%27s_new_in_ACP%3F What's new in ACP].<br />
<br />
'''ACP Style Library''' '''makes it easy '''to select most navigation options and display settings in ACP. The Style Library is packaged as an Analytica library file, which you add to your model, then access the control panels by opening the library diagrams from within Analytica.<br />
<br />
You can make use of the styles without using the Style Library. Styles are specified in the AcpStyles attribute, as described at [[AcpStyles]]. However, the Style Library makes these far easier to use.<br />
<br />
See also the instructions for obtaining the latest version of the [[ACP Style Library]], and for using it.<br />
<br />
<iframe width="560" height="315" src="https://www.youtube.com/embed/uUAk4TwrOAw" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><br />
<br />
==Summary==<br />
'''Analytica Cloud Platform''' (ACP) is a convenient way to share models over the internet, and is usable by people who have not installed any edition of Analytica, as well as people on non-Window’s platforms. ACP accounts are free, and a moderate level of usage is free as long as you keep your support active.<br />
<br />
When sharing models from the Cloud Platform, additional stylistic considerations are important for providing users of your model with a satisfactory browser-based experience. These include limiting evaluation times, keeping diagrams small, and making effective use of diagram real estate through embedded tables and graphs, tabbed panes and hierarchy headers. The Style Library provides an interface for selecting ACP styles.<br />
<br />
==See Also==<br />
* [[Analytica Cloud Platform]] More in-depth information.<br />
* [[Tutorial: Sharing a model with ACP]]<br />
* [[Model Licensing]]<br />
* [[Editions of Analytica]]<br />
* [[What's new in ACP?]]<br />
* [[ACP Style Library]]<br />
* [[AcpStyles]]<br />
<br />
<br />
<footer>User Interfaces for End Users / {{PAGENAME}} / Arrays and Indexes</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Create_a_model&diff=60801Tutorial: Create a model2024-05-01T20:27:07Z<p>Cclermont: /* See Also */</p>
<hr />
<div>[[Category:Analytica Tutorial]]<br />
[[Category: Models]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
__TOC__<br />
</div><br />
<br />
<br />
This chapter shows you how to:<br />
* Create a new model<br />
* Create new variable nodes and enter attributes<br />
* Move and delete variable nodes<br />
* Draw influence arrows to define dependencies between variables<br />
* Define variables as explicit values, functions and lists<br />
* Invoke a built-in function to define a variable<br />
* Do a simple Parametric Analysis<br />
<br />
This chapter shows you how to create a new Analytica model.<br />
<br />
In the process of building a model to analyze the costs of owning and operating an automobile, you will create variables, define dependencies, add documentary text, and compute results.<br />
<br />
If Analytica is not open, start it by double-clicking its icon. If Analytica is already open with an active model go to the [[File menu]], select '''New Model'''.<br />
<br />
==Creating a new model==<br />
{{Release|5.0||When you start up a new Analytica session, it shows the [[Intro screen]]. Click on '"Start a new model".<br />
<br />
{{Release|5.0|6.3|<br />
{{CalloutAnnotationBlock|[[image:ClickOnBlankModel.png]]|<br />
{{CalloutAnnotation|<br />
Click ''Blank Model'' to start a new model.|v=341|pt=87,367|path=r-}}<br />
}}|}}<br />
{{Release|6.4||<br />
{{CalloutAnnotationBlock|[[image:ClickOnBlankModel6_4.png]]|<br />
{{CalloutAnnotation|<br />
Click to ''Start a new model''.|v=310|pt=377,336|path=r-}}<br />
}}|}}<br />
<br />
The blank model initially}}{{Release||4.6|When you start up a new Analytica session it}} shows an [[Object window]] for an untitled model. Behind the Object window you will see an empty [[Diagram window]].<br />
<br />
First you should enter a Title for your model:<br />
<br />
# Click in the Title attribute field (to the right of '''Title'''). Type in '''''Car cost model '''''and press ''Alt- enter''. In the space just above the Title you entered, you will see that the Identifier field automatically changes to '''''Car_cost_model'''''.<br />
# Press ''Tab'' to go to the Description attribute and type in: '''''A demonstration model to show how to calculate the cost of running a car'''''<br />
<br />
<tip>If this is not a first-time entry for Title information, a dialog box will appear to confirm an automatic change to the Identifier.</tip><br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.1.png]]|<br />
{{CalloutAnnotation|<br />
The Identifier field is automatically filled in to match the first 20 characters of the Title. You can also change this manually if desired.|v=5|pt=227,73|path=r-}}<br />
{{CalloutAnnotation|<br />
Tab to, or click in, the Title field (to the right of the label '''Title''') and type '''''Car cost model'''''.|v=170|pt=114,97|path=*|n=1}}<br />
{{CalloutAnnotation|<br />
''Tab'' to the Description field (to the right of the label '''Description''') to enter description information.|v=295|pt=171,148|path=*|n=+}}<br />
{{CalloutAnnotation|<br />
''Author'' and ''creation date'' are filled in automatically. You can also edit the Author if desired. Analytica automatically updates ''Last Saved'' and ''File info''.|v=440|pt=301,232|path=r-|n=+}}<br />
}}<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<tip>You can either press the ''Tab'' key or use the mouse to move between fields.</tip><br />
<br />
:{{Release||4.6|[[File:Chapter_4.2.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.2_5.0.png]]|<br />
{{CalloutAnnotation|<br />
Add your name as the author if your computer does not automatically register your name.|v=20|pt=185,249|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to display the model's '''Diagram''' window.|v=150|pt=13,39|path=*|n=+}}<br />
}}<br />
}}<br />
<br />
==Editing a diagram==<br />
In most of the three previous chapters you were in the browse mode, with the [[toolbar|browse tool]] [[File:Chapter_1.5.png]] highlighted in the tool palette. In browse mode you can view an existing model without changing its structure. When you create a new model the [[toolbar|edit tool]] [[File:Chapter_3.10a.png]] is selected by default. You use the edit tool to create or change a model.<br />
<br />
Be sure to note which tool is selected throughout the remainder of this tutorial.<br />
<br />
:{{Release||4.6|[[File:Chapter_4.4.png]]}}{{Release|5.0||[[File:Chapter_4.4_v5.0.png]]}}<br />
<br />
When the edit tool is selected, a menu of icons is displayed in the '''''node palette'''''. These icons represent the different node types and allow you to add nodes to the diagram.<br />
<br />
==Creating variable nodes==<br />
In this chapter you will create variables in the ''Car Cost'' model.<br />
<br />
Each variable is represented in the [[Diagram window|influence diagram]] as a shape that depicts the [[Class]] of Variable. These shapes are generally referred to as '''''nodes'''''. Select the node shape based on what you know about the variable. If you are not sure what kind of variable to use, choose a General variable [[File:Chapter_4.4a.png]].<br />
<br />
See [[Tutorial: Reviewing a model#Recognizing_influence_diagrams|Tutorial: Recognizing influence diagrams]] for a description of the node shapes.<br />
<br />
:{{Release||4.6|[[File:Chapter_4.6.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.6_v5.0.png]]|<br />
{{CalloutAnnotation|<br />
Choose the edit tool.|v=40|pt=464,42|path=r-|n=1}}<br />
{{CalloutAnnotation|Drag the Variable Node icon to a position in the influence diagram.<br />
<br />
<br />
A new Variable Node appears in the diagram at the location where you release the mouse button.|v=140|pt=589,40|path=r-|n=+}}<br />
}}<br />
}}<br />
<br />
<tip>As you build a model, you should select descriptive titles for your variables. Descriptive variable titles remind you of the model’s logic and help to inform others about how the model operates.</tip><br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.7.png]]|<br />
{{CalloutAnnotation|Type '''''Fuel Cost''''' for the variable title.<br />
<br />
<br />
Press ''Alt+Enter'' or click any other location in the diagram to accept the title.|v=33|pt=95,124|path=r-|n=+}}<br />
}}<br />
<br />
<tip>''Fuel Cost'' is filled with a diagonal line pattern around its text, indicating that it does not yet have a valid definition.</tip><br />
<br />
Repeat Steps 1 and 2 four times to create four more variables that affect fuel cost. Title these variables as follows:<br />
* ''Fuel Price'' (price per gallon of gasoline)<br />
* ''Annual miles'' (number of miles driven each year)<br />
* ''Mpg'' (miles per gallon of gasoline)<br />
* ''Age'' (driver’s age)<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.9.png]]|<br />
{{CalloutAnnotation|<br />
Drag the Variable Node icon to a position on the diagram.|v=15|pt=464,42|path=r-|n=+}}<br />
}}<br />
<br />
Title text wraps to fit within the node as you type. You can manually create a new line in a title by pressing the ''Enter'' key at the desired break point(s). You can also expand the size of the node by dragging one of the corner handles.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.11.png]]|<br />
{{CalloutAnnotation|Type '''''Fuel''''' and press the ''Space'' key.<br />
<br />
<br />
Type '''''Price''''' and press ''Alt+Enter'' to indicate that you are finished.|v=120|pt=351,144|path=r-|n=+}}<br />
{{CalloutAnnotation|Repeat Steps 3 and 4 to create three more variables, as shown.<br />
<br />
<br />
Title the variables '''''Annual Miles, Mpg,''''' and '''''Age'''''.|v=365|n=+}}<br />
}}<br />
<br />
==Saving your model==<br />
Analytica automatically saves each change you make to a backup file. If your computer (or Analytica) should terminate unexpectedly, it will offer to recover your changes the next time you start Analytica. Even so, it’s a good idea to save your changes periodically.<br />
# Select '''Save''' from the [[File menu]] (or press ''Control-s''). The first time you try to save a model, it shows a '''Save As''' dialog, offering to save the model in the '''My Documents''' folder using the model Title as the default file name. You can select another folder and modify the file name.<br />
# Click '''Save''' or press '''Enter''' to save the model in the selected folder.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.13-updated.png]]|<br />
{{CalloutAnnotation|<br />
Select '''Save As''' from the '''File''' menu.|v=65|pt=85,260|path=b!|n=1}}<br />
{{CalloutAnnotation|<br />
Type the new file name here.|v=530|pt=297,1090|path=*|n=+}}<br />
}}<br />
<br />
==Deleting a variable==<br />
Sometimes you might want to delete a variable that you previously created.<br />
<br />
In this example you realize that the driver’s age is not relevant to your understanding of the ''Fuel Cost'' variable. Therefore, you will delete the ''Age'' variable.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.14-updated.png]]|<br />
{{CalloutAnnotation|Select the Age node if it is not already selected.<br />
<br />
<br />
Handles surround the node to indicate that it is selected.|v=0|pt=271,246|path=*|n=1}}<br />
{{CalloutAnnotation|<br />
Select '''Clear''' from the '''Edit''' menu, or press the '''Delete''' key.|v=200|n=+}}<br />
{{CalloutAnnotation|<br />
Handles⠀|Type=Bare|v=330|pt=280,317|path=r-}}<br />
{{CalloutAnnotation|<br />
Handles⠀|Type=Bare|v=330|pt=422,317|path=r-}}<br />
}}<br />
<br />
Analytica asks you to confirm that you want to delete.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.15-updated.png]]|<br />
{{CalloutAnnotation|<br />
Click '''OK''' to confirm that you want to delete the selected object.|v=65|pt=381,195|path=b!|n=+}}<br />
}}<br />
<br />
<tip>You can select multiple nodes by holding down the ''Control'' or ''Shift'' keys, or by placing the cursor in a blank area and dragging diagonally to draw a rectangular frame across the nodes you want to select.</tip><br />
<br />
==Moving nodes==<br />
When you create a model you should try to structure the layout to make the [[Diagram window|influence diagram]] easy to understand. As you refine your model, however, you will undoubtedly want to group nodes in different ways to achieve this goal.<br />
<br />
In this case we anticipate that ''Fuel Cost ''will be derived from the other three variables. Therefore we want to place it apart.<br />
<br />
Moving nodes is a simple matter of dragging them to the desired position. Try moving the nodes into the new configuration below.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.16-updated.png]]|<br />
{{CalloutAnnotation|<br />
Draw the nodes to the new configuration.|v=65}}<br />
}}<br />
<br />
<tip>You can undo or redo a drag operation by selecting '''Undo/Redo''' from the [[Edit menu]], or by typing the keyboard shortcut, ''Control+Z''.</tip><br />
<br />
==Editing variable titles==<br />
The name displayed inside each variable node is referred to as a '''''Title'''''. In this example you will expand the title ''Mpg'' to ''Miles per gallon'':<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.17-updated.png]]|<br />
{{CalloutAnnotation|<br />
Select the ''Mpg'' node.|v=65|pt=109,243|path=*|n=1}}<br />
{{CalloutAnnotation|<br />
Click again inside the node's title to select its text for editing.|v=365|pt=41,625|path=b!|n=+}}<br />
}}<br />
<br />
<tip><br />
Pause briefly between the click to select the node and the click to select the text within it. If you complete two single-clicks too quickly, Analytica interprets your actions as a double-click and opens an [[Object window]].<br />
<br />
If you accidentally open the '''Object''' window, return to the [[Diagram window]] by clicking the '''Diagram''' button [[File:Chapter 4.18-updated.png]].<br />
</tip><br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.19-updated.png]]|<br />
{{CalloutAnnotation|Type '''''Miles per gallon''''' and press ''Alt+Enter.''<br />
<br />
<br />
The new title is displayed.|v=15|pt=34,50|path=*|n=+}}<br />
{{CalloutAnnotation|Type '''''Miles per gallon''''' and press ''Alt+Enter.''<br />
<br />
<br />
The new title is displayed.|v=15|pt=95,372|path=*|n=3}}<br />
}}<br />
<br />
When you change the title of a node, Analytica asks you if you want the Identifier to be automatically changed as well.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter_4.20-updated.png]]|<br />
{{CalloutAnnotation|<br />
Click '''No''' to close this dialog box and keep the identifier as ''Mpg.''|v=200|pt=535,209|path=r-|n=+}}<br />
}}<br />
<br />
<br />
<br />
<br />
<br />
<tip><br />
You can change this behavior, to either turn off automatic updating of the identifier or to make it fully automatic, so that you are not asked. See [[Preferences dialog]] in the [[Analytica User Guide]] for details.<br />
</tip><br />
<br />
==Drawing arrows between nodes==<br />
One of Analytica’s most powerful features is its ability to show relationships between variables in the influence diagram. '''''Influence arrows''''' are used to specify the dependencies between variables.<br />
<br />
Because the ''Miles per gallon'' variable influences the ''Fuel Cost'' variable, you will [[Draw arrows|draw an arrow]] connecting the two nodes.<br />
<br />
{{Release||4.6|<br />
:[[File:Chapter_4.21-updated.png]]<br />
<br />
:[[File:Chapter_4.22-updated.png]]<br />
}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[File:StartArrowDraw.png]]|<br />
{{CalloutAnnotation|<br />
Position the cursor over ''Miles per gallon'' until the hover icons appear. Mouse down on the [[image:HoverDrawArrowIcon.png]] icon.|v=35|pt=250,264|path=r-|n=1}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[File:DrawArrowDrag.png]]|<br />
{{CalloutAnnotation|<br />
Drag from the ''Miles per gallon'' node to the ''Fuel Cost'' node.|v=30|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[File:DrawArrowRelease.png]]|<br />
{{CalloutAnnotation|<br />
Release the mouse button when ''Fuel Cost'' is highlighted. The two nodes are now connected by an arrow, indicating that ''Miles per gallon'' affects ''Fuel Cost''.|v=30|n=+}} <br />
}}<br />
<!--5.0-->}}<br />
<br />
If the nodes are not connected by an arrow, repeat Steps #1 through #3.<br />
<br />
==Deleting an arrow==<br />
Occasionally, you might need to delete an arrow because of an earlier mistake or a change in your understanding of the model. This section shows you how to delete the arrow that connects ''Miles per gallon'' to ''Fuel Cost''.<br />
<br />
{{Release||4.6|You can delete an arrow using either the edit tool or the arrow tool.<br />
<br />
First, make sure you have either the edit tool or arrow tool selected.<br />
<br />
:[[File:Chapter_4.23-updated.png]]<br />
<br />
:[[File:Chapter_4.24-updated.png]]<br />
}}<br />
<br />
{{Release|5.0||First, make sure you have the edit tool selected.<br />
<br />
{{CalloutAnnotationBlock|[[Image:EditToolOnToolbar5.0.png]]<br />
|{{CalloutAnnotation|<br />
Make sure the edit tool is selected.|v=65|pt=466,43|path=-|n=1}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[Image:DeleteArrow-ArrowSelected.png]]|<br />
{{CalloutAnnotation|<br />
Select the arrow by clicking on it. Handles appear when the arrow is selected.|v=60|pt=278,269|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Press the ''Delete'' key to delete the arrow. The arrow disappears.|v=170|n=+}}<br />
{{CalloutAnnotation|<br />
Handles⠀|Type=Bare|v=450|pt=231,270|path=r-}}<br />
{{CalloutAnnotation|<br />
Handles⠀|Type=Bare|v=450|pt=327,270|path=r-}}<br />
}}<br />
<!--5.0-->}}<br />
<br />
==Connecting multiple arrows==<br />
When one variable is influenced by several other variables, you can draw multiple arrows at once. This example shows you how to connect the three variables contributing to the ''Fuel Cost'' variable.<br />
<br />
{{Release||4.6|First make sure the arrow tool is selected.<br />
<br />
:[[File:Chapter 4.25-updated.png]]<br />
<br />
:[[File:Chapter 4.26-updated.png]]<br />
<br />
:[[File:Chapter 4.27-updated.png]]<br />
<br />
:[[File:Chapter 4.28-updated.png]]<br />
}}<br />
{{Release|5.0||<br />
First make sure the edit tool is selected.<br />
<br />
:[[Image:EditToolOnToolbar5.0.png]]<br />
<br />
{{CalloutAnnotationBlock|[[Image:Tutorial_SelectThreeNodes.png]]|<br />
{{CalloutAnnotation|Select ''Annual miles'', ''Miles per gallon'', and ''Fuel Price'' nodes simultaneously.<br />
<br />
<br>(Hold down ''Control'' or ''Shift'' while selecting or drag diagonally across the group.)<br />
|v=75|pt=67,126|path=r(251,416)r|n=1}}<br />
}}<br />
{{CalloutAnnotationBlock|[[Image:StartArrowDraw3.png]]|<br />
{{CalloutAnnotation|Hover over any of the selected nodes until the hover icons appear. Start dragging from the [[image:HoverDrawArrowIcon.png]] icon.|v=150|pt=248,178|n=+}}<br />
}}<br />
{{CalloutAnnotationBlock|[[Image:DragArrowDraw3.png]]|<br />
{{CalloutAnnotation|Release the mouse button when the ''Fuel Cost'' node is highlighted.}}<br />
}}<br />
{{CalloutAnnotationBlock|[[Image:ThreeArrowsToFuelCost.png]]|<br />
{{CalloutAnnotation|Three arrows now point to the ''Fuel Cost'' node.|v=20}}<br />
{{CalloutAnnotation|Deselect all of the nodes by clicking in any location in the diagram that is not on a node.|pt=30,200|n=+|v=170}}<br />
}}<br />
<br />
<!--5.0-->}}<br />
<br />
{{Release|6.0||<br />
== Bending arrows ==<br />
<br />
As your diagrams become more complex, you may sometimes need to bend your arrows around nodes for clarity. Bent arrows can be either curved or crisp. Bent arrows contain ''way points'', which define where the arrow changes directions. . You can insert or remove way points to alter the number of segments in an arrow, and drag the way points to route the arrow as you like.<br />
<br />
When you first select an arrow without a bend, two handles appear near the midpoint -- one is a circle, the other is a square. Drag the circle to create a curved arrow initially, or drag the square to create a crisp bend. As you drag it, you introduce the first way point.<br />
<br />
{{CalloutAnnotationBlock|[[Image:UnbentArrowReadyToBend.png]]|<br />
{{CalloutAnnotation|Select the arrow, then drag the square handle|pt=282,162|path=(100,162)|n=1}}<br />
{{CalloutAnnotation|Release the drag here|pt=392,117|path=(282,*)|v=300|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[Image:UnbentArrowReadyToBend2.png]]|<br />
{{CalloutAnnotation|Repeat for the second arrow|pt=278,248|v=210|n=+}}<br />
}}<br />
<br />
And we have two arrows with crisp bends:<br />
<br />
{{CalloutAnnotationBlock|[[Image:BentArrows.png]]|<br />
{{CalloutAnnotation|Right click on the arrow|pt=392,248|v=210|n=+}}<br />
}}<br />
<br />
To remove the bends, right-click on the arrow and select '''Remove all way points'''.<br />
{{CalloutAnnotationBlock|[[Image:Remove all waypoints.png]]|<br />
{{CalloutAnnotation|Repeat to remove bend in this arrow|pt=390,130|n=+}}<br />
}}<br />
<br />
<br />
}}<br />
<br />
==Entering attributes into the Object window==<br />
Each variable (or other Object) has an [[Object window]] that lets you see and edit its [[Attributes]] - including its Identifier, Title, Units, Description and Definition.<br />
<br />
In this section we will use the '''Object''' window to enter attributes for the ''Annual Miles'' variable. <br />
{{Release||4.6|Make sure to select the edit button [[File:Chapter_3.10a.png]] before continuing.<br />
<br />
:[[File:Chapter 4.29-updated.png]]<br />
}}<br />
<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[Image:SelectingHoverObjectWindow.png]]|<br />
{{CalloutAnnotation<br />
|Click the ''Object window'' hover icon to open its [[Object window]].|pt=111,229|n=1}}<br />
}}<br />
<!--5.0-->}}<br />
<br />
<tip><br />
You can also open a variable’s [[Object window]] by double-clicking the node using the browse or arrow tools. If you are using the browse tool, you will not be able to enter or change documentation.<br />
</tip><br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.30-updated.png]]|<br />
{{CalloutAnnotation<br />
|Identifier⠀|Type=Bare|v=5|pt=253,51|path=r-}}<br />
{{CalloutAnnotation<br />
|Title⠀|Type=Bare|v=87|pt=104,97|path=r-}}<br />
}}<br />
<br />
The identifier in the [[Object window]] shown above is ''Annual_miles''. Analytica assigns the identifier when the title is created. It uses the first 20 characters of the title except for spaces or punctuation, which are replaced by underscores ( _ ). Analytica does not differentiate between uppercase and lowercase letters in identifiers.<br />
<br />
You can directly edit both the identifier and the title.<br />
<br />
First, you will change the variable’s identifier to a short abbreviation so that it can easily be used later in the definitions of other variables. You will then document the variable more fully.<br />
<br />
{{Release||4.6|<br />
:[[File:Chapter 4.31-updated.png]]<br />
}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:EnteringIntoObjectWindow.png]]|<br />
{{CalloutAnnotation|Select the contents of the [[Identifier]] field.|n=+|pt=173,75|path=/|v=85}}<br />
{{CalloutAnnotation|Type '''Mpy''' and press ''Alt+Enter''.|n=+|pt=173,270|path=/|v=290}}<br />
{{CalloutAnnotation|Click the [[Units]] field. Type '''miles/year''' and press ''Alt+Enter''.|n=+|pt=468,460|path=/|v=470}}<br />
}}<br />
<!--5.0-->}}<br />
<br />
<tip><br />
Analytica uses the information from the Units field to label graphs or tables that use the ''Miles per year'' variable; Analytica does not use it in any mathematical computations.<br />
</tip><br />
<br />
{{Release||4.6|<br />
:[[File:Chapter 4.32-updated.png]]<br />
}}{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:EditingTitleInObjectWindow.png]]|<br />
{{CalloutAnnotation|Select the contents of the [[Title]] field and press the ''Delete'' key to erase '''Annual miles'''.|n=+|pt=172,107|v=80}}<br />
{{CalloutAnnotation|Type '''Miles per year''' and press ''Alt+Enter''.|n=+|pt=172,294|v=300}}<br />
}}<br />
<!--5.0-->}}<br />
<br />
<tip><br />
When you change the title of a node, Analytica asks you if you want it to automatically change the identifier to match the new title.<br />
</tip><br />
<br />
{{Release||4.6|<br />
:[[File:Chapter 4.33-updated.png]]<br />
}}{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:ChangeMpgIdentQuestion.png]]<br><br>|<br />
{{CalloutAnnotation|Click '''No''' to keep the [[Identifier]] as '''Mpy'''.|v=150|n=+|pt=513,208|path=bD30-}}<br />
}}{{CalloutAnnotationBlock|[[image:AverageMilesDrivenPerYear.png]]|<br />
{{CalloutAnnotation|Click in the [[Description]] field, type '''Average miles driven per year.''', and press ''Alt+Enter''.|n=+|pt=313,125|path=-|v=25}}<br />
}}<br />
<!--5.0-->}}<br />
<br />
==Defining a variable as an explicit value==<br />
Analytica uses a wide range of variable types. In this section we simply enter an explicit value for the variable. Functional expressions and lists are described later in this chapter. Other variable types are addressed in later chapters.<br />
<br />
For variables as functional expressions see [[#Defining a variable as a function of other variables|Defining a variable as a function of other variables]].<br />
<br />
For variables as lists see [[#Defining a variable as a list|Defining a variable as a list]].<br />
<br />
For variable as tables see [[Tutorial: Arrays]].<br />
<br />
For a demonstration of built-in functions see [[#Defining a variable using a built-in function|Defining a variable using a built-in function]].<br />
<br />
First let’s define ''Miles per year'' as 12,000.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.34-updated.png]]|<br />
{{CalloutAnnotation|<br />
Click in the Definition field to center a mathematical expression for the variable; type '''''12K.'''''|v=35|pt=174,198|path=*|n=1}}<br />
{{CalloutAnnotation|<br />
A warning icon indicates that this variable's definition has not yet been accepted.|v=187|pt=38,209|path=r-}}<br />
}}<br />
<br />
<tip><br />
Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]].<br />
</tip><br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.35-updated.png]]|<br />
{{CalloutAnnotation|<br />
Click the check button or press ''Alt+Enter'' to accept the new definition.|v=35|pt=286,170|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
The warning icon disappears because the variable now has valid definition.|v=187|pt=38,209|path=r-}}<br />
{{CalloutAnnotation|<br />
If you want to cancel what you entered, click the cancel button. |v=339|pt=260,185|path=r-}}<br />
}}<br />
<br />
Whenever another variable’s definition includes the '''''identifier''' (Mpy) of Miles per year'', this defined value, '''12K''', is used as its value.<br />
<br />
{{CalloutAnnotationBlock|[[image:EditToolOnToolbar5.0_ActiveResult.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to return to the influence diagram. |v=0|pt=5,35|path=*|n=+}}<br />
}}<br />
<br />
<br />
<br />
''Miles per year'' is no longer filled with a diagonal line pattern around its title, as shown in the figure below. The clear node indicates that ''Miles per year'' now has a valid definition.<br />
<br />
:[[File:Chapter 4.37-updated.png]]<br />
<br />
==Defining a variable as a function of other variables==<br />
When one variable is dependent upon another variable, you must provide an expression that describes the relationship between the variables. Influence arrows connecting other nodes to ''Fuel Cost'' show the direction of this dependency.<br />
<br />
In this section, you will enter a definition for ''Fuel Cost'' in terms of the values of ''Miles per year, Miles per gallon,'' and ''Fuel Price''.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.40-updated.png]]|<br />
{{CalloutAnnotation|<br />
Enter the variable's units as '''''$/year''''', and description as '''''Annual cost of fuel.'''''|v=35|pt=495,74|path=r-|n=1}}<br />
{{CalloutAnnotation|<br />
Enter the variable's units as '''''$/year''''', and description as '''''Annual cost of fuel.'''''|v=35|pt=209,130|path=*|n=1}}<br />
{{CalloutAnnotation|<br />
Click in the Definition field to enter a mathematical expression.|v=187|pt=209,212|path=r-|n=+}}<br />
}}<br />
<br />
Because Fuel Cost is equal to Fuel Price times miles driven, divided by miles per gallon, you will enter the following expression into the Definition field:<br />
<br />
:<code>Fuel_Price*Mpy/Mpg</code><br />
<br />
An asterisk (<code>*</code>) represents multiplication; a slash (<code>/</code>) represents division.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.41-updated.png]]|<br />
{{CalloutAnnotation|<br />
From the Inputs popup menu select the name of the variable that you want to add, in this case, ''Fuel Price. Fuel_Price'' appears in the Definition field.|v=35|pt=362,166|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Type an asterisk (*).|v=237|n=+}}<br />
}}<br />
<br />
Based on the definition you just entered, the value of ''Fuel Cost'' is calculated by multiplying the values of ''Fuel Price'' and ''Miles per year'', and then dividing the result by the value of ''Miles per gallon''.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.42-updated.png]]|<br />
{{CalloutAnnotation|<br />
Select ''Miles per year'' from the Inputs popup menu.|v=35|n=+}}<br />
{{CalloutAnnotation|<br />
Type a slash (/).|v=137|n=+}}<br />
{{CalloutAnnotation|<br />
Select ''Miles per gallon'' from the Inputs popup menu.|v=189|n=+}}<br />
{{CalloutAnnotation|<br />
Press ''Alt+Enter'' or click the check button to accept the definition. The Definition field should look like this (spaces between terms and operators are optional).|v=291|pt=208,177|path=r-|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:EditToolOnToolbar5.0_ActiveResult.png]]|<br />
{{CalloutAnnotation| Click the '''Diagram''' button to return to the influence diagram.<br />
<br />
<br />
Note that ''Fuel Cost'' is no longer diagonally shaded, indicating that it has a valid definition.|v=0|pt=5,35|path=*|n=+}}<br />
}}<br />
{{CalloutAnnotationBlock|[[image:Chapter 4.43-updated.png]]|}}<br />
<br />
==Entering attributes using the Attribute panel==<br />
Sometimes you may find it more convenient to view or edit attributes of a variable in the [[Attribute panel]] as part of the [[Diagram window|Diagram view]] instead of using a separate [[Object window]].<br />
<br />
In this section, you will enter data for the ''Fuel Price'' variable in the '''Attribute''' panel.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.44-updated.png]]|<br />
{{CalloutAnnotation|<br />
Select the ''Fuel Price'' node.|v=35|pt=101,343|path=*|n=1}}<br />
{{CalloutAnnotation|<br />
Click the arrow icon to display the '''Attribute''' panel.|v=137|pt=17,523|path=b!|n=+}}<br />
}}<br />
<br />
The [[Attribute panel]] appears below the diagram. You can use this view to enter or edit data for the currently selected variable in the influence diagram.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.45-updated.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Attribute popup menu and select '''Description.'''|v=35|pt=370,30|path=rR15U65-|n=+}}<br />
{{CalloutAnnotation|<br />
Enter the description as shown, then press ''Alt-Enter.''|v=137|pt=39,76|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Select '''Units''' from the Attribute popup menu.|v=689|pt=308,438|path=r-|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.46-updated.png]]|<br />
{{CalloutAnnotation|<br />
Type '''''US Dollars,''''' then press ''Alt+Enter.''|v=38|pt=16,65|path=r-|n=+}}<br />
}}<br />
<br />
Now that you have entered attributes for the ''Fuel Price'' variable, you will enter its definition in the [[Attribute panel]].<br />
<br />
In this example we will assume that Fuel Price has a fixed value of $3 per gallon.<br />
<br />
Select '''''Definition''''' from the [[Attribute dropdown menu]] and enter '''3'''.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.47-updated.png]]|<br />
{{CalloutAnnotation|<br />
Select '''Definition''' from the Attribute popup menu.|v=45|pt=352,43|path=r-|n=1}}<br />
{{CalloutAnnotation|<br />
The warning icon is there to remind you that the variable is not yet defined.|v=135|pt=250,43|path=r-}}<br />
{{CalloutAnnotation|Enter '''''3''''' in the Attribute field.<br />
<br />
The ''Fuel Price'' variable is now defined as an explicit value.|v=250}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.48-updated.png]]|<br />
{{CalloutAnnotation|<br />
Note that ''Fuel Price'' is no longer diagonally shaded, indicating that it has a valid definition. |v=296|pt=93,342|path=r-}}<br />
}}<br />
<br />
==Defining a variable as a list==<br />
In this section you will enter [[attributes]] for the ''Miles per gallon'' variable and define it as a sequence of numbers. You will use this sequence later to perform a [[Parametric analysis]] to show how the ''Fuel Cost'' is affected by ''Miles per gallon''.<br />
<br />
Using the [[Attribute panel]], enter '''''Average number of miles per gallon''''' for the description and '''''miles/gallon''''' for the units.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.49-updated.png]]|<br />
{{CalloutAnnotation|<br />
Choose '''Description''' from the Attribute popup menu and enter: '''''Average number of miles per gallon.'''''|v=5|n=1}}<br />
{{CalloutAnnotation|<br />
Choose '''Units''' from the popup menu and enter: '''''miles/gallon''''' |v=275|n=+}}<br />
}}<br />
<br />
Now that you have entered attributes for the ''Miles per gallon'' variable, you will define it as a sequence of integers between 20 and 50, by increments of 10.<br />
<br />
Select '''Definition''' from the [[Attribute dropdown menu]]. You will notice a second popup menu appears to the right. This is [[the Expression popup menu]]. Open the [[Expression popup menu]] and select '''list'''.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.50-updated.png]]|<br />
{{CalloutAnnotation|<br />
Select '''Definition''' from the Attribute popup menu.|v=30|pt=352,43|path=r-|n=1}}<br />
{{CalloutAnnotation|<br />
The Expression popup menu appears next to the Attribute menu.|v=105|pt=510,43|path=r-}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.51-updated.png]]|<br />
{{CalloutAnnotation|<br />
Choose '''list''' from the Expression popup menu.|v=5|n=+}}<br />
{{CalloutAnnotation|<br />
Type '''''20''''' in the first cell and press ''Enter.''|v=235|n=+}}<br />
{{CalloutAnnotation|<br />
Analytica automatically sets the next value using the default increment of 1.|v=295|pt=60,330|path=r-}}<br />
{{CalloutAnnotation|<br />
Change the second cell to '''''30''''' and press ''Enter.''|v=430|pt=60,551|path=b!|n=+}}<br />
{{CalloutAnnotation|<br />
Analytica automatically sets the next value using the increment of 10 (the same as between the previous 2 values).|v=560|pt=60,583|path=r-}}<br />
}}<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.52-updated.png]]|<br />
{{CalloutAnnotation|<br />
Simply press ''Enter'' one more time to complete the sequence.|v=5|n=+}}<br />
}}<br />
<br />
Although the auto-fill feature makes it convenient to enter a simple linear sequence, you are free to edit the values as you please.<br />
<br />
Now you will use the '''''Expression view''''' to see the variable’s definition in a different form. The Expression view shows the full syntax of the definition regardless of the type of variable.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter 4.53-updated.png]]|<br />
{{CalloutAnnotation|<br />
Select '''Expression''' from the Expression popup menu.|v=55|pt=510,45|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
As an alternative to the list view, a list variable can be entered directly using square brackets as shown:|v=135|pt=67,78|path=r-}}<br />
}}<br />
<br />
<br />
<br />
==Viewing results in the Result window==<br />
Now that you have entered attributes and definitions for all variables it is time to see the result. The '''Results button''' calculates values for all selected variables.<br />
<br />
Select the Fuel Cost node and click the Results button [[File:Chapter_4.54-updated.png]].<br />
<br />
{{CalloutAnnotationBlock|[[Image:EditToolOnToolbar5.0_ActiveDefinition.png]]|<br />
{{CalloutAnnotation|<br />
Select the ''Fuel Cost'' variable.|v=5|n=1}}<br />
{{CalloutAnnotation|<br />
Click the Results button.|v=95|pt=215,37|path=r-|n=+}}<br />
}}<br />
{{CalloutAnnotationBlock|[[Image:Chapter_4.55-updated.png]]}}<br />
<br />
<br />
The Result window appears. Icons in the upper left corner of the Result window control the view mode. [[Table view of a result|Tabular form]] [[File:Chapter_4.58-updated.png]] is the default.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter_4.59-updated.png]]|<br />
{{CalloutAnnotation|<br />
The Result window appears in tabular form when the Table icon is selected.|v=43|pt=18,89|path=r-}}<br />
}}<br />
<br />
<tip><br />
The default view for the Results window can be changed. See the [[Preferences dialog]] in the [[Analytica User Guide]] for details.<br />
</tip><br />
<br />
<br />
Click the graph button [[File:Chapter_4.56-updated.png]] to view the results in [[Graph view of a result|graph view]].<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter_4.57-updated.png]]|<br />
{{CalloutAnnotation|<br />
The Result window appears in graph mode when the Graph icon is selected.|v=74|pt=18,121|path=r-}}<br />
}}<br />
<br />
==Defining a variable using a built-in function==<br />
Analytica offers a wide array of built-in functions to simplify the process of defining variables. In this example we will take advantage of the [[Sequence]] function to re-define the Miles per gallon variable.<br />
<br />
Let’s suppose you want to change the sequence such that the interval between ''Miles per gallon'' values is 5 instead of 10.<br />
<br />
Select the ''Miles per gallon'' variable. Make sure that the Attribute window is open and '''Definition''' is selected.<br />
<br />
Next, open [[the Expression popup menu]] and select '''Other''' at the bottom of the list. This opens the [[Object_Finder_dialog|Object finder]] where you will find a large collection of built-in functions. Analytica will prompt to confirm that you want to replace the current definition of the variable. Click '''OK'''.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter_4.60-updated.png]]|<br />
{{CalloutAnnotation|<br />
Select '''Other''' from the Expression popup menu.|v=248|pt=488,284|path=r-|n=1}}<br />
{{CalloutAnnotation|<br />
Confirm that you are replacing the current definition by clicking '''OK.'''|v=475|pt=107,522|path=r-|n=+}}<br />
}}<br />
<br />
The [[Sequence]] function is contained in the [[:Category:Array Library|Array library]], under Creating lists. Choose '''Creating Lists'" under the Array library from the Library popup menu.<br />
<br />
Scroll down the list and select '''Sequence'''.<br />
<br />
Enter '''''20''''' for the start value, '''''50''''' for the end value, and '''''5''''' for the step. (Leave the ''strict'' field blank.) Click '''OK'''.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter_4.61-updated.png]]|<br />
{{CalloutAnnotation|<br />
Select '''— Creating lists''' under '''Array''' from the Library popup menu.|v=88|pt=219,75|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Scroll down and choose the '''Sequence''' function.|v=219|pt=136,206|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Enter start value '''''20,''''' end value '''''50''''' and step value '''''5.'''''|v=329|n=+}}<br />
{{CalloutAnnotation|<br />
Click '''OK''' to finish.|v=439|n=+}}<br />
}}<br />
<br />
The new definition is displayed in the [[Attribute panel]].<br />
<br />
:[[File:Chapter_4.62-updated.png]]<br />
<br />
Select the ''Fuel Cost'' variable and click the Results button [[File:Chapter_4.54-updated.png]]. The result shows improved precision with the smaller ''Miles per gallon'' intervals.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter_4.63-updated.png]]|<br />
{{CalloutAnnotation|<br />
Select Fuel Cost and click the Results button [[File:Chapter_4.54-updated.png]].|v=88|n=+}}<br />
{{CalloutAnnotation|<br />
Toggle between table and graph views.|v=219|pt=18,91|path=rR10!|n=+}}<br />
{{CalloutAnnotation|<br />
Toggle between table and graph views.|v=219|pt=18,122|path=rR10!|n=+}}<br />
}}<br />
<br />
==Expression Assist==<br />
As you type textual expressions into definitions, [[Expression Assist]] provides continual context sensitive identifier completion and help on functions and their parameters. Next you will erase and re-enter the definition for ''miles per gallons'', typing it textually this time rather than using the [[Object Finder dialog|Object Finder]], in order to acquaint you with Expression Assist.<br />
<br />
On the diagram, select ''Miles per gallon'' and press the Object Window button [[File:Chapter_4.64-updated.png]] on the tool bar.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter_4.65-updated.png]]|<br />
{{CalloutAnnotation|<br />
Highlight the existing definition and press the ''Delete'' key.|v=188|pt=253,217|path=r-|n=1}}<br />
}}<br />
<br />
Now you are ready to begin typing the definition anew. Press the ’S’ character and notice the identifier completion popup showing a list of identifiers starting with ’S’. Continue with the ’e’ character, and identifiers beginning with "Se" display:<br />
<br />
:[[File:Chapter_4.66-updated.png]]<br />
<br />
Now, to save typing, press down-arrow three times to select [[Sequence]] and press ''Tab''. The function name is inserted into the definition, saving you keystrokes. Now a popup shows you the parameters of the Sequence function and its description. The parameter that you are currently typing appears in bold, with optional parameter in italics.<br />
<br />
{{CalloutAnnotationBlock|[[Image:Chapter_4.67-updated.png]]|<br />
{{CalloutAnnotation|<br />
Finish typing: Sequence(20,50,5)|v=25|pt=265,46|path=tU10-|n=+}}<br />
{{CalloutAnnotation|<br />
As you type, watch the bolding progress.|v=95|pt=335,111|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Press the green check.|v=165|pt=238,37|path=*|n=+}}<br />
}}<br />
<br />
==Saving your model==<br />
After you have created part or all of a model, you should save it. Select '''Save''' from the [[File menu]] (or press ''control-s''). Because you previously saved your model, it is saved with the original name. You can quit Analytica by choosing '''exit''' from the [[File menu]] or closing the Analytica window.<br />
<br />
==Summary==<br />
In this chapter you have:<br />
* Started a new model<br />
* Created new variables<br />
* Entered attributes for variables in two different ways: using the Objects window and the Attributes window<br />
* Re-arranged variable nodes to improve the appearance of your influence diagram<br />
* Drawn arrows to establish relationships between variables<br />
* Defined variables as explicit values, functions and lists<br />
* Used a built-in function to define a variable<br />
* Displayed the result of a simple parametric analysis<br />
<br />
In the next chapter, you will extend the ''Car Cost'' model to include tables of data.<br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [[Create a model]]<br />
* [[Create and edit a model]]<br />
* [[Create and save a model]]<br />
* [[Create and edit nodes]]<br />
* [[To open or exit a model]]<br />
* [[Combining models into an integrated model]]<br />
* [[Test and debug your model]]<br />
* [[Tutorial: Sharing a model with ACP]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Analytica User FAQs/Modeling issues]]<br />
* [[Working with Large Models]]<br />
* [[Object Window]]<br />
* [[Definition menu]]<br />
* [[Local Values]]<br />
* [[Tutorial: Arrays#Defining_a_variable_as_a_table|Tutorial: Defining a variable as a table]]<br />
* [[Attributes]]<br />
* [[Manage attributes]]<br />
* [[To edit an attribute]]<br />
* [[Attribute panel]]<br />
* [[Draw arrows]]<br />
* [[Tutorial: Decision trees#Drawing_arrows_between_variables|Tutorial: Drawing arrows between variables]]<br />
* [[Draw arrows between modules]]<br />
* [[Parametric analysis]]<br />
* [[Result window]]<br />
* [[Graph view of a result]]<br />
* [[Table view of a result]]<br />
* [[Expression Assist]]<br />
* [[The Expression popup menu]]<br />
* [[Tutorial videos]]<br />
</div><br />
<br />
<br />
<footer>Tutorial: Analyzing a model/ {{PAGENAME}} / Tutorial: Arrays</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Indexes_and_arrays:_An_introduction&diff=60672Indexes and arrays: An introduction2024-04-27T23:04:41Z<p>Cclermont: </p>
<hr />
<div>[[Category:Analytica User Guide]]<br />
<breadcrumbs>Analytica User Guide > Arrays and Indexes > {{PAGENAME}}</breadcrumbs><br />
<br />
Analytica's Intelligent Arrays are central to its power and convenience. They make it much easier and more flexible than spreadsheets and programming languages to use and build models with multiple dimensions -- such as [[Time]], geographic regions, products, or scenarios. Even the [[Run]] index over random samples is just another dimension. You will find most aspects of Intelligent Arrays natural and intuitive. But you may find some aspects get a little getting used to, especially if you are a spreadsheet expert, or familiar with computer languages, like Visual Basic, R, and Python. <br />
<br />
So, even if you usually ignore manuals, we encourage you to you look through this page. It introduces the key concepts of indexes and arrays with a simple example.<br />
<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
__TOC__<br />
</div><br />
<br />
=== Create an index ===<br />
<br />
An Index identifies a set of options, often used as a dimension of an Array. Suppose you want to compare the fuel cost of three different vehicles, each with different fuel efficiency. We start by defining an index <code>Car_type</code>, which lists three different types of cars as text values. You create a new index, like any new variable, by dragging an index node from the node menu. Once you have created the new node, type in a title <code>Car type</code>. <br />
<br />
:[[File:Chapter11_4.jpg]]<br />
<br />
Show its definition attribute in the Attribute pane below the diagram, and select '''List of Labels '''from the [[expr]] menu. Then type the car type the first care type as '''Standard'''. Press ''Enter'' to add the next cell. Type in '''Hybrid''', and '''SUV '''(Sports Utility Vehicle) as two more cells. Now the Car_type is ready to use as an Index for tables, including ''Edit tables'' containing input values, and ''results'' wiht a value for each each Car type.<br />
<br />
:[[File:Chapter11_5.jpg]]<br />
<br />
=== Create an edit table ===<br />
<br />
Create a new variable by dragging it from the node menu, and typing a title <code>Miles per gallon</code>. Draw an arrow from the index <code>Car type</code> to the new node so that you can create a table with numbers for each Car type.<br />
<br />
<tip title="Tip">By default, diagrams don't show arrows to or from index nodes (after you have drawn them.) That's because each index is often used by many other variables. So showing all the arrows tends to clutter up the diagram. But, you can see them if you want. Open the [[Diagram Style dialog]] from the [[Diagram menu]], and check '''Show arrows to/from Indexes '''. </tip><br />
<br />
In the attribute panel above, we show the definition of <code>Miles_per_gallon</code>, and select '''Table '''from the [[expr]] menu. This opens the '''Indexes '''dialog to let you choose which index(es) to use for the table dimensions.<br />
<br />
:[[File:Chapter11_6.jpg]]<br />
<br />
It starts with <code>Car_type</code> as the selected index because you drew the arrow from it (see [[Indexes dialog]]). Click '''OK '''to accept. An edit table appears, indexed by <code>Car_type</code>, with cells initialized to '''0'''.<br />
<br />
:[[File:Chapter11_7.jpg]]<br />
<br />
You can now edit the cells of the table. Type in a number for each <code>Car_type</code>.<br />
<br />
:[[File:Chapter11_8.jpg]]<br />
<br />
This completes the edit table for '''Miles per gallon'''.<br />
<br />
=== Combine a scalar and 1D array ===<br />
Now let’s calculate the annual fuel cost for each car type. We create three new variables, <code>Miles_per_year</code>, <code>Fuel_price</code>, and <code>Fuel_cost</code> and draw the arrows.<br />
<br />
:[[File:Chapter11_9.jpg]]<br />
<br />
Type these definitions for the new variables: <br />
:<code>Miles_per_year := 10K </code><br />
:<code>Fuel_price := 3.00</code><br />
:<code>Fuel_cost := Fuel_price * Miles_per_year / Miles_per_gallon</code><br />
<br />
Select <code>Fuel_cost</code> and click the '''Result '''button to show this result table.<br />
<br />
:[[File:Chapter11_10.jpg]]<br />
<br />
=== Array abstraction with operators +, -, *, / ===<br />
This result for <code>Fuel_cost</code> was computed using <code>Miles_per_gallon</code> for each <code>Car_type</code>, and the single a number, <code>3.00</code> for <code>Fuel_price</code> and <code>10K</code> for <code>Miles_per_year</code>. The arithmetic operators <nowiki>*</nowiki> and / work when one or both operands are arrays, just as well as when they as when they are single number – also known as an '''''atom '''''or '''''scalar '''''. The same is true for +, -, and ^. This is an example of '''''array abstraction''''', central to Intelligent Arrays™.<br />
<br />
=== '''Define another edit table''' ===<br />
Now let’s add in the maintenance costs. We create a new variable <code>Maintenance_cost</code>, defined as an edit table, based on the <code>Car_type</code> index, just as we did for <code>Miles_per_gallon</code>.<br />
<br />
:[[File:Chapter11_11.jpg]]<br />
<br />
We now create <code>Operating_cost</code> as the sum of <code>Fuel_cost</code> and <code>Maintenance_cost. The Diagram looks like this:</code><br />
<br />
:[[File:Chapter11_12.jpg]]<br />
Since <code>Fuel_cost</code> and <code>Maintenance_cost</code>are both 1D arrays indexed by <code>Car_type</code>, their sum is also indexed by <code>Car_type</code>. Each cell of the result is the simply the sum of the corresponding cells of each input variable:<br />
<br />
:[[File:Chapter11_13.jpg]]<br />
<br />
=== Make an index as a sequence of numbers ===<br />
Now let’s add another index, <code>Year</code>, so that we can extend the model to compute the costs for multiple years. We create the new index as before. In its definition we enter <code>2008..2012</code>, to specify the start and end year.<br />
<br />
:[[File:Chapter11_14.jpg]]<br />
<br />
The value of <code>Year</code> is now the sequence of years from <code>2008</code> to <code>2012</code>. (See [[Creating an index]] and [[Functions that create indexes]] for other ways to define indexes.)<br />
<br />
'''Compound annual growth of fuel price by year''': What happens if <code>Fuel_price</code> changes over time? Let’s model <code>Fuel_price</code> starting with its current value of <code>3.00</code> ($/gallon) multiplied by a compound annual growth rate (CAGR) of <code>8%</code> per year:<br />
<br />
:<code>Fuel_price_cagr := 8%</code><br />
:<code>Fuel_price := 3.00 * (1 + Fuel_price_cagr)^(Year – 2008)</code><br />
<br />
This expression says that <code>Fuel_Price</code> starts at <code>3.0</code> in <code>Year 2008</code> (when the exponent (<code>Year - 2008</code>) is zero. For each subsequent year, we raise <code>(1 + 8%)</code> to the power of the number of years from the start year, <code>2008</code>— i.e., standard compound growth. Here’s the result.<br />
<br />
:[[File:Chapter11_15.jpg]]<br />
<br />
Click the graph icon [[File:Chapter11_16.jpg]] to view this as a graph.<br />
<br />
:[[File:Chapter11_17.jpg]]<br />
<br />
=== Combine two 1D arrays with different indexes ===<br />
Now look at <code>Fuel_cost</code>. Its has three inputs, <code>Miles_per_year</code>, which is still a single number, <code>10K</code>, <code>Miles_per_gallon</code>, which is indexed by <code>Car_type</code>, and <code>Fuel_price</code>, which is now indexed by <code>Year</code>. The result is a two-dimensional table indexed by both <code>Car_type</code> and <code>Year</code>. It contains every combination of <code>Miles_per_gallon</code> by <code>Car_type</code> and <code>Fuel_price</code> by <code>Year</code>.<br />
<br />
:[[File:Chapter11_18.jpg]]<br />
<br />
=== Result has indexes of all operands ===<br />
This illustrates a general rule for Intelligent Arrays: The result of an expression contains the union of the sets of indexes of the elements (operands).<br />
<br />
'''Pivot a table, exchanging rows and columns''': In the table above, it shows <code>Car_type</code> down the rows and <code>Year</code> across the columns. To pivot the table — i.e., exchange rows and columns — select the other index from the menu defining the columns (or the rows).<br />
<br />
:[[File:Chapter11_19.jpg]]<br />
<br />
(We expanded the window size so that all rows are visible.)<br />
<br />
=== Rows and columns are just for display of tables ===<br />
Unlike other computer languages, with Analytica, you don’t need to worry about the ordering of the indexes in the table. Rows and columns are simply a question of how you choose to display the table. They are not intrinsic to the internal representation of an array.<br />
<br />
=== Add a dimension to an edit table ===<br />
Maintenance costs also changes over time, so we need to add <code>Year</code> as dimension. Simply draw an arrow from <code>Year</code> to <code>Maintenance_cost</code>.<br />
<br />
:[[File:Chapter11_21.jpg]]<br />
<br />
When it prompts ''“Do you wish to add Year as a new index of the table in Maintenance_cost?” ''click '''Repeat Values'''. Now open the edit table for <code>Maintenance_cost</code>. It has added <code>Year</code> as a second dimension, copying the number for each <code>Car_type</code> across the years.<br />
<br />
:[[File:Chapter11_20.jpg]]<br />
<br />
Notice that it shows the same values for each <code>Year</code>, following the rule that a value is constant over a (previously) unused index. Now you can edit these numbers to reflect how maintenance cost increases over time.<br />
<br />
:[[File:Chapter11_22.jpg]]<br />
<br />
===Combine two 2D arrays with the same indexes===<br />
Let’s look at the value of <code>Operating_cost</code> again.<br />
<br />
:[[File:Chapter11_23.jpg]]<br />
<br />
Since its inputs, <code>Fuel_cost</code> and <code>Maintenance_cost</code>, are both indexed by <code>Car_type</code> and <code>Year</code>, the result is also indexed by those two indexes. Each cell contains the sum of the corresponding cells from the two input variables. The diagram now looks like this.<br />
<br />
:[[File:Chapter11_24.jpg]]<br />
<br />
=== A list of numbers for parametric sensitivity analysis ===<br />
Suppose you’re not sure how many miles you drive per year. You want to examine three scenarios. You include three values in <code>Miles_per_year</code> by specifying a list of numbers enclosed in square brackets:<br />
<br />
:<code>Miles_per_year := [5K, 10K, 15K]</code><br />
<br />
Even though <code>Miles_per_year</code> is not defined as an index node, it becomes an [[implicit index]]. This is an example of model behavior analysis, described in [[Parametric analysis]].<br />
<br />
===Combine three 1D arrays with different indexes===<br />
Now all three inputs to <code>Fuel_cost</code> are one-dimensional arrays, each with a different index. Its result is a three-dimensional table, computed for each combination of three input variables, so indexed by <code>Miles_per_year</code>, as well as <code>Year</code> and <code>Car_type</code>.<br />
<br />
:[[File:Chapter11_25.jpg]]<br />
<br />
The new third index, <code>Miles_per_year</code>, appears as a slicer index, initially showing the slice for '''5000 '''miles/year. You can click the ''down-arrow ''for a menu to choose another value, or click the diagonal arrows [[File:Chapter11_26.jpg]] to step through the values for miles/year. See [[Result_window#Index_selection|Index selection]].<br />
<br />
===Pivot a 3D table===<br />
You can also pivot a table to display, for example, the <code>Car_type</code> down the rows and <code>Miles_per_year</code> across the columns, for a selected <code>Year</code> in the slicer.<br />
<br />
:[[File:Chapter11_27.jpg]]<br />
<br />
=== Combine 2D and 3D array with two common indexes ===<br />
When we look at <code>Operating_cost</code> again, it also now has three dimensions. Again the result has the union of the indexes of its operands.<br />
<br />
:[[File:Chapter11_28.jpg]]<br />
<br />
It is the sum of fuel cost and maintenance cost, each of which is indexed by <code>Car_type</code> and <code>Year</code> as before, but now <code>Fuel_cost</code> has the third index, <code>Miles_per_year</code>. The result contains all three dimensions.<br />
<br />
=== Propagate indexes automatically ===<br />
Note how each time we add an index to an input variable, or change a variable, e.g., <code>Miles_per_year</code>, to be a list of values, the new dimensions automatically propagate through the downstream variables. The results have the desired dimensions (the union of the input dimensions) without any need to modify their definitions to mention those indexes explicitly.<br />
<br />
=== Sum over an index ===<br />
If we want to sum over <code>Year</code> to get the total cost, we define a new variable:<br />
<br />
:<code>Variable Total_operating_cost := Sum(Operating_cost, Year)</code><br />
<br />
We mention the index <code>Year</code>, over which we want to calculate the sum. But, we do not need to mention any of the other indexes of the parameter <code>Operating_cost</code>.<br />
<br />
The built-in function [[Sum]](x, i) is called an '''''array-reducing function''''', because it reduces its parameter «x» by one dimension, namely «i». There are a variety of other reducing functions, including [[Max]]](x, i), [[Min]](x, i), and [[Product]]](x, i) (see [[Array-reducing functions]]). These functions explicitly specify the index over which they operate. Since they mention it by name, you don’t need to know or worry about any ordering of dimension in the array.<br />
<br />
=== X[i = v]: subscript ===<br />
The [[Subscript-Slice_Operator|subscript construct]] lets you extract a slice or subarray from an array, say the values for the <code>Hybrid Car_type</code>:<br />
:<code>Operating_cost[Car_type <nowiki>=</nowiki> 'Hybrid'] &rarr; </code><br />
<br />
:[[File:Chapter11_29.jpg]]<br />
<br />
You can also select multiple subscripts in one expression:<br />
<br />
:<code>Fuel_cost[year <nowiki>= </nowiki>2012, Car_type = 'SUV', Miles_per_year = 10K] &rarr; 1775</code><br />
<br />
=== Name-based subscripting ===<br />
You can list the indexes in any order since you identify them by name. Again you don’t need to remember which dimension is which. This is called '''''name-based subscripting syntax''''', in contrast to the more conventional sequence-based subscripting. In addition to absolving you from having to remember the ordering, name-based subscripting generalizes flexibly as you add or remove dimensions of the model.<br />
<br />
=== Subscripting by an array ===<br />
The value «v» in [[Subscript-Slice_Operator|x[i = v]]] can itself be an array. For example, if you wanted to get the operating cost only for even years:<br />
<br />
:<code>Operating_cost[Miles_per_year = 10K, Year = [2008, 2010, 2012]]</code><br />
<br />
:[[File:Chapter11_30.jpg]]<br />
<br />
=== Purchase price and depreciation ===<br />
To complete the model, let’s add the <code>Purchase_price</code>, an edit table indexed by <code>Car_type</code> (just as we created <code>Miles_per_gallon</code>).<br />
<br />
:[[File:Chapter11_31.jpg]]<br />
<br />
To annualize this, we compute the annual depreciation, using a depreciation rate of 18% per year— typical for an automobile:<br />
<br />
:<code>Variable Depreciation_rate := 18%</code><br />
:<code>Variable Annual_depreciation := Purchase_price*Depreciation_rate*(1 - Depreciation_rate)^(Year - 2008)</code><br />
<br />
It calculates this formula for each <code>Year</code>, raising <code>(1 - Depreciation_rate)</code> to the power of the number of years from 2008.<br />
<br />
:[[File:Chapter11_32.jpg]]<br />
<br />
=== IF THEN ELSE with arrays ===<br />
Suppose that there is a government rebate of $2000 when you purchase a hybrid. You could create an edit table by <code>Car_type</code> and <code>Year</code> with <code>-$2000</code> for Hybrid in 2008 and <code>$0</code> in all other cells. (The rebate is negative because we are treating the numbers as costs.) A more elegant method is to define it as a conditional expression based on <code>Year</code> and <code>Car_type</code>:<br />
<br />
:<code>Variable Hybrid_rebate := IF Year = 2008 AND Car_type <nowiki>= </nowiki>'Hybrid THEN -2000 ELSE 0</code><br />
<br />
It calculates the expression for each value of the indexes, in this case <code>Year</code> and <code>Car_type</code>, with this result.<br />
<br />
:[[File:Chapter11_33.jpg]]<br />
<br />
The subexpression <code>Year <nowiki>=</nowiki> 2008</code> returns an array indexed by <code>Year</code> containing 1 (true) for 2008 and 0 (false) for the other years. Subexpression <code>Car_type <nowiki>=</nowiki> 'Hybrid' </code> returns an array indexed by <code>Car_type</code>, containing 1 (true) for <code>'Hybrid'</code> and 0 (False) for the other <code>Car_type</code>. Therefore, the expression <code>Year = 2008 AND Car_type = 'Hybrid' </code> returns an array indexed by both <code>Year</code> and <code>Car_type</code>, containing 1 (true) only when both subexpressions are true, that is 1 for Hybrid in 2008 and 0 for the other cells. The entire <code>IF</code> expression therefore returns '''-2000 '''for the corresponding top-left cell and '''0 '''for the others. <br />
<br />
=== Compare a list of variables ===<br />
To summarize the results, it is useful to compare the four types of cost, <code>Fuel_cost</code>, <code>Maintenance_cost</code>, <code>Purchase_price</code>, and <code>Hybrid_rebate</code>, in one table. Let’s make a variable <code>Cost_summary</code>, and first define it as an empty list, i.e., square brackets with nothing between them yet:<br />
<br />
:<code>Variable Cost_summary := []</code><br />
<br />
Now draw an arrow from each of the four variables you want to view to <code>Cost_summary</code>, in the sequence you want them to appear. Each time you draw an arrow into a variable defined as a list, it automatically adds that variable into the list. (If the origin variable was already in the list, it removes it again.) Here is the diagram showing the resulting definition for <code>Cost_summary</code>'''.<br />
<br />
:[[File:Chapter11_34.jpg]]<br />
<br />
<tip title="Tip">This diagram does not display arrows from index nodes to avoid confusion with crossing arrows. We switched these off by restoring '''Show arrows to/from '''Indexes to unchecked (the default) in the [[Diagram Style dialog]] from the [[Diagram menu]].</tip><br />
<br />
The resulting definition is a list of variables. The result for <code>Cost_summary</code> is four-dimensional, adding a new index, also labeled <code>Cost_summary</code>, showing the variables in the list.<br />
<br />
:[[File:Chapter11_35.jpg]]<br />
<br />
=== Constant value over an index not in array ===<br />
Note that only <code>Fuel_cost</code> depends on <code>Miles_per_year</code>. The other three quantities, Maintenance cost, Annual depreciation, and Hybrid rebate, are expanded over that index in the table, using the same number for each value of <code>Miles_per_year</code>. This is an example of a general principle: <br />
* '''''An array that does not contain index «i» as a dimension is treated as though it has the same value over each element of «i» when there is a need to expand it to include «i» as a dimension.'''''<br />
<br />
'''Totals in a table''': To see the total over the costs and over the <code>Years</code>, check the two <code>Totals</code> boxes next to the row and column menus.<br />
<br />
:[[File:Chapter11_36.jpg]]<br />
<br />
=== Self index ===<br />
The new index containing the titles of the four cost variables in the list is also called <code>Cost_summary</code>. Thus, the identifier <code>Cost_summary</code> serves double-duty as an index for itself. This is known as a '''''self index''''', and can be accessed using the [[IndexValue]]() function.<br />
<br />
If we want to compute the sum of the four costs, we can use [[Sum]](x, i) to sum array «x» over index «i». In this case, we sum <code>Cost_summary</code> over its self index, also <code>Cost_summary</code>: <br />
<br />
:<code>Variable Total_cost_by_year := Sum(Cost_summary, Cost_summary)</code><br />
<br />
=== Sum(x, i) ===<br />
We also want to compute the average cost per mile over all the years. First we compute total cost over time, using the [[Sum]]() function:<br />
<br />
:<code>Variable Total_cost := Sum(Cost_summary, Year)</code><br />
<br />
As before, we need to specify the index over which we are summing, <code>Year</code>, but we don’t need to mention any other indexes, such as <code>Car_type</code> and <code>Miles_per_year</code>, which are irrelevant to this summation.<br />
<br />
Next we calculate the <code>Total_miles</code> over <code>Year</code>:<br />
<br />
:<code>Variable Total_miles := Sum(Miles_per_year, Year)</code><br />
<br />
:[[File:Chapter11_37.jpg]]<br />
<br />
Note that <code>Miles_per_year</code> is not indexed by <code>Year</code>. The principle of ''Constant value over unused indexes ''implies that <code>Miles_per_year</code> has the same value for each <code>Year</code>. Hence, the result is the miles per year multiplied the number of years, in this case 5.<br />
<br />
Finally, we define:<br />
<br />
:<code>Variable Cost_per_mile := Total_cost/Total_miles</code><br />
<br />
=== Add a new item to an index ===<br />
What if you want to extend this model to include '''Compact '''as a fourth <code>Car_type</code>? Open one of the edit tables indexed by <code>Car_type</code>, say <code>Miles_per_gallon</code>. Click the last <code>Car_type</code>, '''SUV''', to select that row (or column), and press ''Enter ''or the ''down-arrow ''key. It says ''“Changing the size of this index will affect table definitions of other variables. Change data in tables indexed by Car_Type?” ''This warns that adding a new <code>Car_type</code> will affect all the edit tables indexed by <code>Car_type</code>. Click '''OK''', and it adds a new bottom row, with the same label '''SUV '''as the previous bot- tom row, and with value '''0'''. Double-click the index label in this bottom row, and type the new <code>Car_type</code>, '''Compact''', to replace it. Then enter its value, say '''30 '''(miles/gallon).<br />
<br />
:[[File:Chapter11_38.jpg]]<br />
<br />
=== Expanding index for other edit tables ===<br />
Now open the edit table for <code>Maintenance_cost</code>, and you will see a new row for '''Compact '''already added, initialized to '''0 '''in each cell. You just need to enter numbers for <code>Maintenance_cost</code> for the '''Compact '''car, as shown here.<br />
<br />
:[[File:Chapter11_39.jpg]]<br />
<br />
Next enter numbers for the <code>Maintenance_cost</code> for the '''Compact '''car. Then enter a purchase price for the '''Compact '''car.<br />
<br />
:[[File:Chapter11_40.jpg]]<br />
<br />
=== Automatic propagation of changes to index ===<br />
Now you’ve entered the data for '''Compact Car_type '''into the three edit tables, you’re done. All the computed tables automatically inherit the expanded index and do the right thing — without you needing to make any change to their definitions. For example, <code>Cost_summary</code> now looks like this.<br />
<br />
:[[File:Chapter11_41.jpg]]<br />
<br />
Finally, let’s compute the net present value cost as the objective, using the reducing function [[Npv]](discount, x, i). We define:<br />
<br />
:<code>Variable Discount_rate := 12%</code><br />
:<code>Objective NPV_cost := NPV(Discount_rate, Total_cost_by_year, year)</code><br />
<br />
Here is the final diagram, showing '''NPV_Cost'''.<br />
<br />
:[[File:Chapter11_42.jpg]]<br />
<br />
:[[File:Chapter11_43.jpg]]<br />
<br />
=== Monte Carlo sampling and Intelligent Arrays ===<br />
Almost any variable in Analytica can be uncertain — that is, probabilistic. Each probabilistic quantity is represented by a random sample of values, generated using Monte Carlo (or Latin hyper- cube) simulation. Each random sample is an array indexed by a special system variable [[Run]]. The value of [[Run]] is a sequence of integers from 1 to <code>Sample_size</code>, a system variable specifying the sample size for simulation. For most operations and functions, [[Run]] is just another index, and so is handled just like other indexes by the Intelligent Arrays. You can see it when you choose the [[Sample]] uncertainty view. In other uncertainty views, such as [[Mean]] or [[CDF]], the values displayed are computed from the underlying sample. See [[Uncertainty views]].<br />
<br />
=== Progressive refinement ===<br />
As we developed this simple model, we refined it by adding indexes progressively. First, we defined <code>Car_type</code>, then <code>Year</code>, and finally we changed <code>Miles_per_year</code> from a single value to a list of values for [[parametric analysis]]. Creating <code>Cost_summary</code> added a fourth index, consisting of the four cost categories. It is often a good idea to build a model like this — starting with a simple version of a model with no or few indexes, and then extending or disaggregating it by adding indexes — and also sometimes removing indexes if they don’t seem important.<br />
<br />
This approach to development is sometimes called '''''progressive refinement'''''. By starting simple, you get something working quickly. Then you expand it in steps, adding refinements where they seem to be most useful in improving the representation. A more conventional approach, trying to implement the full detail from the start, risks finding that it’s just too complicated, so it takes a long time to get anything that works. Or, you might find that some of the details are excessive — they just weren’t worth the effort.<br />
<br />
Progressive refinement is a much easier in Analytica than in a spreadsheet and most other computer languages — where extending or adding a dimension requires major surgery to the model to add subscripting and loops. With Intelligent Arrays, to extend or add an index, you only need to change edit tables or definitions that actually do something with the new index. The vast majority of formulas generalize appropriately to handle a modified or new dimension without needing any changes.<br />
<br />
=== Summary of Intelligent Arrays and array abstraction ===<br />
Intelligent Arrays make it easy to extend and add dimensions (indexes) in Analytica. If you find yourself using a lot of subscripts and explicit iteration with [[For and While Loops|For loops]]), you might be fighting against Intelligent Arrays rather than letting them do the work for you. Adding unnecessary iteration makes your models harder to write, understand, and maintain. They'll be less robust and will ake much longer to compute than if you let Analytica do its thing. Take the time to understand them, and you should find that you can greatly simplify your model.<br />
<br />
In a spreadsheet, extending a dimension means you have (at least) to go through every table that uses that dimension and stretch the cells over the extended rows or columns. It's easy to make mistakes. Adding a dimension is hard work, especially after the first two dimensions. With languages like R or Python, you can easily extend a dimension with new elements, but takes a lot more effort to add a new dimension. Typically, you have to add a loop over the new index and a subscripts to every array variable for every operation. The broadcasting technique in Python libraries can help a bit -- but even there you have to remember the sequencing of indexes, "inner" or "outer", and code carefully to make it all work. In Analytica, each dimension is identified by an Index variable, enabling Analytica to do what you want without you having to even mention the dimensions in most operations, like arithmetic operations, comparisons, and so on. <br />
<br />
Almost every operator, construct, and function in Analytica supports array abstraction, automatically generalizing as you add or remove dimensions to their operands or parameters. (See [[Ensuring Array Abstraction]] for the few exceptions and how to handle them if you want to make sure that your model fully supports this array abstraction.)<br />
<br />
=== General principles of [[Intelligent Arrays]]™ ===<br />
: '''Omit irrelevant indexes: '''An expression need not mention any index that it does not explicitly operate over.<br />
: '''A value is constant over unused index: ''' Any function or expression that operates over an Index «i» on a value «x» (atom or array), which does not have «i» as a index, treats «x» as constant over «i» -- i.e. as if it had the same value «x» for each value of «i».<br />
: '''Rows and columns are features of displayed tables, not arrays: '''You can choose which index to show down the rows or across the columns, or as a slicer dimension. You (almost) never need to think about about the order in which indexes are used in an array.<br />
: '''The indexes of the result of an expression contain the union of the indexes of its component arrays: '''The result of an operation or expression contains the union of the indexes of any arrays that it uses ''— ''that is, all indexes from the arrays, without duplicating any index that is in more than one array. There are two unsurprising exceptions:<br />
:* When the expression contains an ''array-reducing function or construct'', such as [[Sum]](x, i) or [[Subscript-Slice_Operator|x[i = v]]], the result will not contain the index «i» over which it is reduced.<br />
:* When the expression creates an index, the result will also contain the new index.<br />
:To be more precise, we can define the behavior of Intelligent Arrays thus: For any expression or function '''F(x) '''that takes a parameter or operand «x» that is an array indexed by «i», for any element «k» of index «i»:<br />
::<code>F(x[i = k]) = F(x)[i = k]</code><br />
:In other words, you get the same result if you select element «k» of index «i» of array «x» and then apply F() as if you first apply F() to array «x» and then select element «k» of index «i» of the result. This turns out to be an extremely powerful principle. It underlies Analytica's array abstraction which lets you define expressions on arrays without needing to do explicit iteration over each index as you would need in conventional computer languages.<br />
<br />
=== Exceptions to array abstraction ===<br />
The vast majority of operators, constructs, and functions fully support [[Intelligent Arrays]] — that is, they generalize appropriately when their operands or parameters are arrays. A few do not, notably the [[Sequence_Operator|sequence operator]] ('''..'''), [[Sequence]]() function, and [[While..Do|While loop]]. When you use these, you need to take special care to ensure that your models perform array abstraction conveniently when you add or modify dimensions. For how, see[[Ensuring Array Abstraction]].<br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [[Tutorial: Arrays]]<br />
* [[Array]]<br />
* [[Table]]<br />
* [[Multidimensional array]]<br />
* [[Array Function Example Variables]]<br />
* [[Array Manipulation Examples and Challenge Problems]]<br />
* [[Intelligent Arrays]]<br />
* [https://www.youtube.com/watch?v=_8ZaXnEwhoE Intelligent Array Abstraction] (an explanatory video on YouTube)<br />
* [http://WebinarArchive.Analytica.com/2008-01-11-Intro-to-arrays.wmv Intro-to-arrays (Part 1).wmv] (an explanatory video about Analytica arrays and indexes (part 1); requires Windows Media player) <br />
* [http://WebinarArchive.Analytica.com/2008-01-17-Intro-to-arrays2.wmv Intro-to-arrays (Part 2).wmv] (an explanatory video about Analytica arrays and indexes (part 2); requires Windows Media player) <br />
* [[Tutorial: Arrays#Viewing_the_results_of_a_multi-dimensional_array|Tutorial: Viewing the results of a multi-dimensional array]]<br />
* [[Ensuring Array Abstraction]]<br />
* [[Local Indexes]]<br />
* [[Implicit Dimensions]]<br />
* [[Modeling Depreciation]]<br />
* [[Parametric analysis]]<br />
* [[Arrays in Optimization Models and Array Abstraction]]<br />
* [[Subscript]]<br />
* [[Slice]]<br />
</div><br />
<br />
<br />
<footer>Intelligent Arrays / {{PAGENAME}} / IF a THEN b ELSE c with arrays</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Reviewing_a_model&diff=60663Tutorial: Reviewing a model2024-04-24T17:59:19Z<p>Cclermont: </p>
<hr />
<div>[[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<br />
<div style="font-size: 1.2em;"><br />
<p><strong>This tutorial shows you how to explore a model by examining the Rent vs. Buy model's:</strong></p><br />
<ul><br />
<li><strong>Influence diagrams</strong></li><br />
<li><strong>Variables</strong></li><br />
<li><strong>Attributes</strong></li><br />
<li><strong>Definitions</strong></li><br />
<li><strong>Results</strong></li><br />
</ul><br />
<p><strong>NOTE: If you are using the model as modified from Chapter 1, change the value of Time horizon back to 10, the value of Monthly rent back to 1200, and the value of Buying price back to 140K. <br />
Also change the Rate of inflation back to a normal distribution with a mean of 3.5 and a standard deviation of 1.3.</strong></p><br />
</div><br />
<br />
<div style="text-align: left;"><br />
<div style="column-count: 1; -moz-column-count: 1; -webkit-column-count: 1;"><br />
__TOC__<br />
</div><br />
</div><br />
<br />
==Recognize influence diagrams==<br />
In this chapter, you will delve into some of the details of the ''Rent vs. Buy'' model. You will not use the top diagram that you used in [[Tutorial: Open a model to browse|Chapter 1]].<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 2.1.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Model'' node to open it.|v=179|pt=250,215|path=r-|n=1}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Model'' node to open it.|v=480|pt=200,515|path=r-|n=1}}<br />
}}}}<br />
<br />
The details of an Analytica model display in an [[Diagram window|influence diagram window]]. An influence diagram (shown below) is a graphical representation of a model, showing how different variables in the model interact with each other. A typical influence diagram consists of a number of '''''nodes''''' connected by '''''arrows'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 2.2.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|<br />
Tools palette⠀|Type=Bare|v=4|pt=4,15|path=r-}}<br />
}}<br />
{{Release|5.0|6.3|{{CalloutAnnotationBlock|[[image:Chapter_2_2b.png]]|<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=58,138|path=r-}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=61,233|path=*}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=57,341|path=*}}<br />
{{CalloutAnnotation|<br />
Influence diagram window|Type=Bare|v=265|pt=23,285|path=r-}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter_2_2b_64.png]]|<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=58,138|path=r-}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=61,233|path=*}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=57,341|path=*}}<br />
{{CalloutAnnotation|<br />
Influence diagram window|Type=Bare|v=265|pt=23,285|path=r-}}<br />
}}}}<br />
}}<br />
'''''Nodes''''' represent variables and appear as boxes, ovals, hexagons, and other shapes. Different node shapes represent different types of variables. Analytica uses the term '''''variable''''' broadly to include anything that has a value or can be evaluated. Note that many of the variables have the same names as the inputs and output at the top diagram that you used in [[Tutorial: Open a model to browse|Chapter 1]]. The top diagram provides an easy way to see and change these nodes’ values.<br />
<br />
'''''Arrows''''' connecting different variables indicate a relation between the variables. The arrow connecting ''Rate of inflation ''to ''Appreciation rate ''indicates that the value of the ''Appreciation rate ''variable depends on the value of the ''Rate of inflation ''variable. In the ''Rent vs. Buy ''model influence diagram, ''Cost to Buy ''depends on the ''Buying price'', ''Rate of inflation'', ''Appreciation rate'', ''Discount rate'', and ''Time horizon ''variables.<br />
<br />
The following figure illustrates different types of nodes.<br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 2.3.png]]}}<br />
{{Release|6.4||[[File:Chapter 2.3_64.png]]}}<br />
<br />
==Open Object windows==<br />
Every object in Analytica has an associated [[Object window]] containing detailed information about it. You can display the '''Object''' window of any variable by double-clicking its node in the [[Diagram window|influence diagram]].<br />
<br />
{{Release||6.3|{{CalloutAnnotationBlock|[[image:Chapter 2.4.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Buying price'' node to open the ''Buying price'' '''Object''' window.|v=92|pt=58,138|path=r-|n=1}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 2.4_64.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Buying price'' node to open the ''Buying price'' '''Object''' window.|v=92|pt=58,138|path=r-|n=1}}<br />
}}}}<br />
<br />
Information about a variable is provided in a list of attributes. [[Attributes]] include the variable’s class (for example, decision, chance, or constant), identifier, units, title, description, definition, inputs, and outputs. See the illustration below.<br />
<br />
:[[File:Chapter 2.5.png]]<br />
<br />
<tip>You can enter numbers with a suffix abbreviation, so Buying Price can be defined as either 140K or 140000. A quick reference for these suffixes is given on [[Number formats]] page.</tip><br />
<br />
==Move between Object windows==<br />
You have opened the [[Object window]] of a variable (''Buying price'') by double-clicking its node in the [[Diagram window|influence diagram]].<br />
<br />
The '''Object '''window contains a list of the variable’s '''''inputs '''''and '''''outputs''''', if there are any.<br />
<br />
You can open the [[Object window]] for any input or output variable by double-clicking the one you wish to view.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.6.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the output variable titled ''Mortgage loan amount.''|v=92|pt=166,436|path=b!|n=1}}<br />
}}<br />
<br />
Analytica opens the '''Object''' window for ''Mortgage loan amount''.<br />
<br />
:[[File:Chapter 2.7.png]]<br />
<br />
Note in the figure above that the '''''Title '''''of ''Mortgage loan amount ''is different from the variable’s [[identifier]], ''Mortgage''. The title is what the model user normally sees; the identifier is used as a mathematical symbol in the definitions of other variables that depend on this variable.<br />
<br />
The [[definition]] of the ''Mortgage loan amount ''is an [[Expressions|expression]], the sum of ''Buying price ''and ''Down payment ''(which is a negative amount). The definition refers to these variables by their identifiers.<br />
<br />
{{Release|5.4||}}<tip>The color of the text in the definition varies, to help you spot mistakes as you read or edit Definitions. See [[Syntax_coloring_and_fonts_and_error_underlining|Syntax coloring]] in the User Guide.</tip><br />
<br />
'''''Inputs '''''lists the identifiers and titles of the variables in the definition. ''Buying price'', the variable you just examined, is one of the inputs. The other input of ''Mortgage loan amount ''is ''Down payment''.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.8 6.0.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Down payment'' input.|v=140|pt=115,205|path=b!|n=+}}<br />
}}<br />
<br />
The [[Object window]] now displays the [[attributes]] of ''Down payment''.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.9 6.0.png]]|<br />
{{CalloutAnnotation|<br />
Click the close button to close the window and return to the diagram.|v=72|pt=660,34|path=r-|n=+}}<br />
}}<br />
<br />
==Use the Attribute panel==<br />
As an alternative to viewing a variable’s attributes in a separate window, you can inspect them in the [[Attribute panel]], which is an auxiliary window pane that you can open below the influence diagram.<br />
<br />
The [[Attribute panel]] allows you to rapidly examine one [[attributes|attribute]] at a time of any variable in the model. You select the variable you wish to view and select the attribute to examine from a popup menu.<br />
<br />
The variable ''Buying price ''should be highlighted with a title in white, indicating that it is selected; if it is not, select it by clicking it once.<br />
<br />
{{Release||6.3|{{CalloutAnnotationBlock|[[image:Chapter 2.4.png]]|<br />
{{CalloutAnnotation|<br />
Click the down arrow icon to open the '''Attribute''' panel.|v=400|pt=14,536|path=*|n=1}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 2.4_64.png]]|<br />
{{CalloutAnnotation|<br />
Click the down arrow icon to open the '''Attribute''' panel.|v=400|pt=14,536|path=*|n=1}}<br />
}}}}<br />
<br />
By default, Analytica displays the '''''description '''''of the selected node (e.g., ''Buying price'') in the [[Attribute panel]].<br />
<br />
:{{Release||6.3|[[File:Chapter 2.11.png]]}}<br />
{{Release|6.4||[[File:Chapter 2.11_6.4.png]]}}<br />
<br />
==Inspect definitions in the Attribute panel==<br />
The [[Attribute panel]] allows you to inspect any attribute of a variable.<br />
<br />
In this section, you will see the [[definition]] of two variables that you viewed in the top-level diagram in [[Tutorial: Open a model to browse|Chapter 1]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.12.png]]|<br />
{{CalloutAnnotation|<br />
Click '''Description''' to view the Attribute popup menu.|v=70|pt=315,45|path=r-|n=1}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.13.png]]|<br />
{{CalloutAnnotation|<br />
Select '''Definition''' as the new current attribute to display.|v=244|pt=297,281|path=r-|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.14.png]]|<br />
{{CalloutAnnotation|<br />
The definition of ''Buying price'' is displayed. It is a single number: 140K (140,000).|v=5|pt=15,38|path=*|n=+}}<br />
}}<br />
<br />
<br />
<!--Not since 4.5 When a variable is defined as an '''''uncertainty distribution''''', a button appears in the '''Definition''' field.--><br />
{{CalloutAnnotationBlock|{{Release||5.3|[[image:Chapter 2.15.png]]}}{{Release|5.4||[[image:Chapter 2.15 6.0.png]]}}|<br />
{{CalloutAnnotation| Select the ''Rate of inflation'' node.<br />
<br />
<br />
The definition in this example is a normal distribution; hence, the '''Normal''' function is shown.|v=15|pt=66,119|path=r-|n=+}}<br />
}}<br />
<br />
In [[Tutorial: Open a model to browse|Chapter 1]] you saw that ''Rate of inflation'' is defined as a [[normal]] distribution with a [[mean]] of 3.5 and a [[Sdeviation|standard deviation]] of 1.3.<br />
<br />
==Open modules==<br />
Analytica models generally contain '''''modules'''''. Each [[Modules and Libraries|module]] contains the details of a part of the model, also represented as an [[influence diagram]]. In the ''Rent vs. Buy'' model, ''Cost to Buy'' and ''Cost to Rent'' are both modules.<br />
<br />
Modules can also contain other modules. In this manner, a large model with hundreds of variables can be organized into a hierarchy of modules, each small enough to be easily understood.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.16.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Cost to Buy'' node to open the module.|v=112|pt=271,235|path=*|n=1}}<br />
}}<br />
<br />
Analytica displays the influence diagram of the ''Cost to Buy'' [[Modules and Libraries|module]]. This module contains three additional modules: ''Out-of-pocket costs to own, Future sales proceeds,'' and ''Opportunity cost''.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.17.png]]|<br />
{{CalloutAnnotation|<br />
Output arrowhead⠀|Type=Bare|v=78|pt=630,217|path=r-}}<br />
{{CalloutAnnotation|<br />
Input arrowhead⠀|Type=Bare|v=140|pt=25,234|path=b!}}<br />
}}<br />
<br />
The '''''input arrowhead''''' (without a trailing line) shows that the node to the right of the arrow has one or more inputs from outside this module.<br />
<br />
The '''''output arrowhead''''' shows that the node to the left of the arrow has one or more outputs outside this module.<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to return to the parent diagram, ''Model.'' |v=0|pt=5,35|path=*|n=+}}<br />
}}<br />
<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.19.png]]|<br />
{{CalloutAnnotation| Double-click the ''Cost to Rent'' node to open the module.<br />
<br />
<br />
The ''Cost to Rent'' diagram opens (see the figure below). |v=0|pt=272,450|path=b!|n=+}}<br />
}}<br />
<br />
Analytica limits the number of open windows at each level of the model hierarchy to minimize clutter on your screen. See [[Managing windows]] in the [[Analytica User Guide]] for information on how to open more than one module [[Diagram window]] at a time.<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to return to the parent diagram, ''Model.'' |v=0|pt=5,35|path=*|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.20.png]]|<br />
{{CalloutAnnotation|<br />
Combined arrowhead⠀|Type=Bare|v=100|pt=472,160|path=r-}}<br />
}}<br />
<br />
The combined arrowhead, shown above, indicates that the node has one or more inputs from outside this module, plus the input variable in this module.<br />
<br />
You can also navigate the model by tracking a variable’s [[User input nodes and user output nodes|inputs or outputs]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.22.png]]|<br />
{{CalloutAnnotation|<br />
Select the ''Buying price'' node.|v=108|pt=58,138|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Select '''Outputs''' from the Attribute popup menu to view a list of variables that depend on the ''Buying price'' variable.|v=180|pt=270,379|path=*|n=+}}<br />
{{CalloutAnnotation|<br />
Double-click ''Insurance.''|v=330|pt=13,430|path=*|n=+}}<br />
}}<br />
<br />
The Out-of-pocket costs to own module diagram is brought to the front, with the Insurance node selected.<br />
<br />
==Learn about nodes using Help balloons==<br />
[[Help balloons]] pop up when you hover over a node for about a second, and display the title, units, and description for a variable. These allow you to browse information very rapidly without having to open the object window. Balloons do not appear when objects do not have the Help or Description attribute filled in.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.24.png]]|<br />
{{CalloutAnnotation|<br />
Hover the mouse over the node and wait for about 1 second.|v=45|pt=339,115|path=r-|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to view the ''Cost to buy'' diagram.|v=0|pt=5,30|path=*|n=+}}<br />
}}<br />
<br />
==Using Pop-up node controls==<br />
<br />
Pop-up node controls appear around a node, when you move the mouse cursor over a node and wait half a second, or when you click a node. Click on a pop-up control to open the Object Window, Result window, or Expression view for this Variable, or to open the Diagram for a Module node. See the User guide for a complete explanation [[Pop-up_node_controls]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.24-2.png]]|<br />
{{CalloutAnnotation|<br />
When you Hover the mouse over a node Popup node controls appear - usually before the help balloon (if present).|n=10|v=5|pt=250,137|path=r-}}{{CalloutAnnotation|<br />
When you Hover the mouse over the node Popup node controls appear - usually before the help balloon (if present).|n=10|v=5|pt=275,137|path=r-}}{{CalloutAnnotation|<br />
When you Hover the mouse over the node Popup node controls appear - usually before the help balloon (if present).|n=10|v=5|pt=300,137|path=r-}}<br />
}}<br />
<br />
==Inspect values in the Attribute panel==<br />
The [[Attribute panel]] allows you to view certain attributes, such as a variable’s '''''value''''', that are not (initially) displayed in an [[Object window]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.25.png]]|<br />
{{CalloutAnnotation|<br />
Select the ''Present value of buying'' node.|v=60|pt=339,103|path=r-|n=1}}<br />
{{CalloutAnnotation|<br />
Click the key icon to open the '''Attribute''' panel.|v=155|pt=18,516|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Press the Attribute popup menu and select '''Value'''.|v=275|pt=311,668|path=b!|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.26.png]]|<br />
{{CalloutAnnotation|<br />
The deterministic (or mid) value of ''Present value of buying displays'', in this case, -67.2K.|v=10}}<br />
}}<br />
<br />
If '''''Value '''''was not previously computed, Analytica computes the variable’s value '''''deterministically''''', assuming that all of the input probability distributions are fixed at their median values. [[Mid]] value is an abbreviation for this deterministically computed value.<br />
<br />
You can use the [[Attribute panel]] in this manner to examine the mid value of any variable in the model.<br />
<br />
It is faster to compute a mid (deterministic) value than an uncertain (probabilistic) value, so it is useful for conducting initial checks of a model before performing any uncertainty analysis.<br />
<br />
==Display results==<br />
When you are viewing a model’s [[Diagram window|influence diagram]], you can evaluate any variable and display its value in a [[Result window]].<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveResult.png]]|<br />
{{CalloutAnnotation|<br />
With ''Present value of buying'' still selected, click the '''Result''' button to evaluate it.|v=30|pt=215,50|path=r-|n=1}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.27.png]]|}}<br />
<br />
<br />
A [[Result window]] displays the [[Probability density and mass graphs|probability density function graph]] for this variable. Analytica displays the [[Uncertainty view of a result|uncertainty view]] that was most recently selected from the [[Uncertainty views|Uncertainty View]] popup menu, or that was saved with the model.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.29-updated.png]]|<br />
{{CalloutAnnotation|<br />
Click the close button to close the '''Result''' window.|v=150|pt=673,37|path=*|n=+}}<br />
}}<br />
<br />
<tip>The ''Rent vs. Buy ''model uses financial flow conventions: funds flowing in (received) have positive values; funds flowing out (expended) have negative values.</tip><br />
<br />
As an alternative to clicking the '''Result''' button [[File:Chapter 2.29.1.png]] and then selecting an uncertainty view, you can use the [[Result menu]] to evaluate a variable and select the [[Uncertainty view of a result|uncertainty view of the result]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.30.png]]|<br />
{{CalloutAnnotation|<br />
With ''Present value of buying'' still selected, select the '''Result''' menu. The check mark next to '''Probability Density''' indicates that the '''Probability Density''' was last displayed. Select '''Cumulative Probability'''.|v=5|pt=36,255|path=b!|n=+}}<br />
}}<br />
<br />
The [[Result window]] appears displaying the variable’s [[Distribution_Densities_Library#Cumulative_Probability_Functions|cumulative probability distribution]].<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to display the ''Cost to buy'' diagram. |v=40|pt=39,50|path=r-|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.33.png]]|<br />
{{CalloutAnnotation|<br />
Select ''Moving costs'' and then click the '''Result''' button to evaluate. |v=40|pt=215,47|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Select ''Moving costs'' and then click the '''Result''' button to evaluate. |v=40|pt=534,533|path=r-|n=5}}<br />
}}<br />
<br />
A single [[mid]] value appears in table view.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.34.png]]|<br />
{{CalloutAnnotation|<br />
Uncertainty View Popup Menu⠀|Type=Bare|v=38|pt=14,59|path=r-}}<br />
}}<br />
<br />
The [[mid]] value in [[Table view of a result|table view]] is the only result view available for a nonprobabilistic variable with a single value.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.35.png]]|<br />
{{CalloutAnnotation|<br />
Select '''Probability Mass''' from the Uncertainty View popup menu.|v=5|pt=34,172|path=b!|n=+}}<br />
}}<br />
<br />
Analytica tells you that this is a nonprobabilistic value.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.36.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''OK''' button.|v=5|pt=485,196|path=b!|n=+}}<br />
}}<br />
<br />
==Summary==<br />
You now have browsed the ''Rent vs. Buy'' model by examining its influence diagrams, variables, attributes, definitions, and results. These are the basic techniques for exploring any Analytica model.<br />
<br />
The next chapter shows you how to analyze the Rent vs. Buy model.<br />
<br />
You can quit Analytica at this point.<br />
<br />
<br><br />
==Tutorial Video - With An Old Version of Analytica ==<br />
<center><br />
<iframe width="640" height="360" src="https://www.youtube.com/embed/mpF4xcmKaao" frameborder="0" allowfullscreen></iframe><br />
<br />
'''Tutorial Video:''' [https://youtu.be/mpF4xcmKaao Review/explore a model] (8 minutes)<br />
</center><br />
<br />
<br><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=mpF4xcmKaao Exploring a model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[Examining a Model]]<br />
* [[Diagram window]]<br />
* [[Creating Lucid Influence Diagrams]]<br />
* [[Object Window]]<br />
* [[Classes of variables and other objects]]<br />
* [[Attributes]]<br />
* [[Attribute panel]]<br />
* [[Entering Attributes using the Attribute panel]]<br />
* [[Definitions]]<br />
* [[Import a module or library]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Help balloons]]<br />
* [[Result Tables and Graphs]]<br />
* [[Result window]]<br />
* [[Managing windows]]<br />
</div><br />
<br />
<br />
<footer>Tutorial: Open a model to browse/ {{PAGENAME}} / Tutorial: Analyzing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Reviewing_a_model&diff=60662Tutorial: Reviewing a model2024-04-24T17:58:46Z<p>Cclermont: </p>
<hr />
<div>[[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<br />
<div style="font-size: 1.2em;"><br />
<p><strong>This tutorial shows you how to explore a model by examining the Rent vs. Buy model's:</strong></p><br />
<ul><br />
<li><strong>Influence diagrams</strong></li><br />
<li><strong>Variables</strong></li><br />
<li><strong>Attributes</strong></li><br />
<li><strong>Definitions</strong></li><br />
<li><strong>Results</strong></li><br />
</ul><br />
<p><strong>If you are using the model as modified from Chapter 1, change the value of Time horizon back to 10, the value of Monthly rent back to 1200, and the value of Buying price back to 140K. <br />
Also change the Rate of inflation back to a normal distribution with a mean of 3.5 and a standard deviation of 1.3.</strong></p><br />
</div><br />
<br />
<div style="text-align: left;"><br />
<div style="column-count: 1; -moz-column-count: 1; -webkit-column-count: 1;"><br />
__TOC__<br />
</div><br />
</div><br />
<br />
==Recognize influence diagrams==<br />
In this chapter, you will delve into some of the details of the ''Rent vs. Buy'' model. You will not use the top diagram that you used in [[Tutorial: Open a model to browse|Chapter 1]].<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 2.1.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Model'' node to open it.|v=179|pt=250,215|path=r-|n=1}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Model'' node to open it.|v=480|pt=200,515|path=r-|n=1}}<br />
}}}}<br />
<br />
The details of an Analytica model display in an [[Diagram window|influence diagram window]]. An influence diagram (shown below) is a graphical representation of a model, showing how different variables in the model interact with each other. A typical influence diagram consists of a number of '''''nodes''''' connected by '''''arrows'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 2.2.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|<br />
Tools palette⠀|Type=Bare|v=4|pt=4,15|path=r-}}<br />
}}<br />
{{Release|5.0|6.3|{{CalloutAnnotationBlock|[[image:Chapter_2_2b.png]]|<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=58,138|path=r-}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=61,233|path=*}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=57,341|path=*}}<br />
{{CalloutAnnotation|<br />
Influence diagram window|Type=Bare|v=265|pt=23,285|path=r-}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter_2_2b_64.png]]|<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=58,138|path=r-}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=61,233|path=*}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=57,341|path=*}}<br />
{{CalloutAnnotation|<br />
Influence diagram window|Type=Bare|v=265|pt=23,285|path=r-}}<br />
}}}}<br />
}}<br />
'''''Nodes''''' represent variables and appear as boxes, ovals, hexagons, and other shapes. Different node shapes represent different types of variables. Analytica uses the term '''''variable''''' broadly to include anything that has a value or can be evaluated. Note that many of the variables have the same names as the inputs and output at the top diagram that you used in [[Tutorial: Open a model to browse|Chapter 1]]. The top diagram provides an easy way to see and change these nodes’ values.<br />
<br />
'''''Arrows''''' connecting different variables indicate a relation between the variables. The arrow connecting ''Rate of inflation ''to ''Appreciation rate ''indicates that the value of the ''Appreciation rate ''variable depends on the value of the ''Rate of inflation ''variable. In the ''Rent vs. Buy ''model influence diagram, ''Cost to Buy ''depends on the ''Buying price'', ''Rate of inflation'', ''Appreciation rate'', ''Discount rate'', and ''Time horizon ''variables.<br />
<br />
The following figure illustrates different types of nodes.<br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 2.3.png]]}}<br />
{{Release|6.4||[[File:Chapter 2.3_64.png]]}}<br />
<br />
==Open Object windows==<br />
Every object in Analytica has an associated [[Object window]] containing detailed information about it. You can display the '''Object''' window of any variable by double-clicking its node in the [[Diagram window|influence diagram]].<br />
<br />
{{Release||6.3|{{CalloutAnnotationBlock|[[image:Chapter 2.4.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Buying price'' node to open the ''Buying price'' '''Object''' window.|v=92|pt=58,138|path=r-|n=1}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 2.4_64.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Buying price'' node to open the ''Buying price'' '''Object''' window.|v=92|pt=58,138|path=r-|n=1}}<br />
}}}}<br />
<br />
Information about a variable is provided in a list of attributes. [[Attributes]] include the variable’s class (for example, decision, chance, or constant), identifier, units, title, description, definition, inputs, and outputs. See the illustration below.<br />
<br />
:[[File:Chapter 2.5.png]]<br />
<br />
<tip>You can enter numbers with a suffix abbreviation, so Buying Price can be defined as either 140K or 140000. A quick reference for these suffixes is given on [[Number formats]] page.</tip><br />
<br />
==Move between Object windows==<br />
You have opened the [[Object window]] of a variable (''Buying price'') by double-clicking its node in the [[Diagram window|influence diagram]].<br />
<br />
The '''Object '''window contains a list of the variable’s '''''inputs '''''and '''''outputs''''', if there are any.<br />
<br />
You can open the [[Object window]] for any input or output variable by double-clicking the one you wish to view.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.6.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the output variable titled ''Mortgage loan amount.''|v=92|pt=166,436|path=b!|n=1}}<br />
}}<br />
<br />
Analytica opens the '''Object''' window for ''Mortgage loan amount''.<br />
<br />
:[[File:Chapter 2.7.png]]<br />
<br />
Note in the figure above that the '''''Title '''''of ''Mortgage loan amount ''is different from the variable’s [[identifier]], ''Mortgage''. The title is what the model user normally sees; the identifier is used as a mathematical symbol in the definitions of other variables that depend on this variable.<br />
<br />
The [[definition]] of the ''Mortgage loan amount ''is an [[Expressions|expression]], the sum of ''Buying price ''and ''Down payment ''(which is a negative amount). The definition refers to these variables by their identifiers.<br />
<br />
{{Release|5.4||}}<tip>The color of the text in the definition varies, to help you spot mistakes as you read or edit Definitions. See [[Syntax_coloring_and_fonts_and_error_underlining|Syntax coloring]] in the User Guide.</tip><br />
<br />
'''''Inputs '''''lists the identifiers and titles of the variables in the definition. ''Buying price'', the variable you just examined, is one of the inputs. The other input of ''Mortgage loan amount ''is ''Down payment''.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.8 6.0.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Down payment'' input.|v=140|pt=115,205|path=b!|n=+}}<br />
}}<br />
<br />
The [[Object window]] now displays the [[attributes]] of ''Down payment''.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.9 6.0.png]]|<br />
{{CalloutAnnotation|<br />
Click the close button to close the window and return to the diagram.|v=72|pt=660,34|path=r-|n=+}}<br />
}}<br />
<br />
==Use the Attribute panel==<br />
As an alternative to viewing a variable’s attributes in a separate window, you can inspect them in the [[Attribute panel]], which is an auxiliary window pane that you can open below the influence diagram.<br />
<br />
The [[Attribute panel]] allows you to rapidly examine one [[attributes|attribute]] at a time of any variable in the model. You select the variable you wish to view and select the attribute to examine from a popup menu.<br />
<br />
The variable ''Buying price ''should be highlighted with a title in white, indicating that it is selected; if it is not, select it by clicking it once.<br />
<br />
{{Release||6.3|{{CalloutAnnotationBlock|[[image:Chapter 2.4.png]]|<br />
{{CalloutAnnotation|<br />
Click the down arrow icon to open the '''Attribute''' panel.|v=400|pt=14,536|path=*|n=1}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 2.4_64.png]]|<br />
{{CalloutAnnotation|<br />
Click the down arrow icon to open the '''Attribute''' panel.|v=400|pt=14,536|path=*|n=1}}<br />
}}}}<br />
<br />
By default, Analytica displays the '''''description '''''of the selected node (e.g., ''Buying price'') in the [[Attribute panel]].<br />
<br />
:{{Release||6.3|[[File:Chapter 2.11.png]]}}<br />
{{Release|6.4||[[File:Chapter 2.11_6.4.png]]}}<br />
<br />
==Inspect definitions in the Attribute panel==<br />
The [[Attribute panel]] allows you to inspect any attribute of a variable.<br />
<br />
In this section, you will see the [[definition]] of two variables that you viewed in the top-level diagram in [[Tutorial: Open a model to browse|Chapter 1]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.12.png]]|<br />
{{CalloutAnnotation|<br />
Click '''Description''' to view the Attribute popup menu.|v=70|pt=315,45|path=r-|n=1}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.13.png]]|<br />
{{CalloutAnnotation|<br />
Select '''Definition''' as the new current attribute to display.|v=244|pt=297,281|path=r-|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.14.png]]|<br />
{{CalloutAnnotation|<br />
The definition of ''Buying price'' is displayed. It is a single number: 140K (140,000).|v=5|pt=15,38|path=*|n=+}}<br />
}}<br />
<br />
<br />
<!--Not since 4.5 When a variable is defined as an '''''uncertainty distribution''''', a button appears in the '''Definition''' field.--><br />
{{CalloutAnnotationBlock|{{Release||5.3|[[image:Chapter 2.15.png]]}}{{Release|5.4||[[image:Chapter 2.15 6.0.png]]}}|<br />
{{CalloutAnnotation| Select the ''Rate of inflation'' node.<br />
<br />
<br />
The definition in this example is a normal distribution; hence, the '''Normal''' function is shown.|v=15|pt=66,119|path=r-|n=+}}<br />
}}<br />
<br />
In [[Tutorial: Open a model to browse|Chapter 1]] you saw that ''Rate of inflation'' is defined as a [[normal]] distribution with a [[mean]] of 3.5 and a [[Sdeviation|standard deviation]] of 1.3.<br />
<br />
==Open modules==<br />
Analytica models generally contain '''''modules'''''. Each [[Modules and Libraries|module]] contains the details of a part of the model, also represented as an [[influence diagram]]. In the ''Rent vs. Buy'' model, ''Cost to Buy'' and ''Cost to Rent'' are both modules.<br />
<br />
Modules can also contain other modules. In this manner, a large model with hundreds of variables can be organized into a hierarchy of modules, each small enough to be easily understood.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.16.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Cost to Buy'' node to open the module.|v=112|pt=271,235|path=*|n=1}}<br />
}}<br />
<br />
Analytica displays the influence diagram of the ''Cost to Buy'' [[Modules and Libraries|module]]. This module contains three additional modules: ''Out-of-pocket costs to own, Future sales proceeds,'' and ''Opportunity cost''.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.17.png]]|<br />
{{CalloutAnnotation|<br />
Output arrowhead⠀|Type=Bare|v=78|pt=630,217|path=r-}}<br />
{{CalloutAnnotation|<br />
Input arrowhead⠀|Type=Bare|v=140|pt=25,234|path=b!}}<br />
}}<br />
<br />
The '''''input arrowhead''''' (without a trailing line) shows that the node to the right of the arrow has one or more inputs from outside this module.<br />
<br />
The '''''output arrowhead''''' shows that the node to the left of the arrow has one or more outputs outside this module.<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to return to the parent diagram, ''Model.'' |v=0|pt=5,35|path=*|n=+}}<br />
}}<br />
<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.19.png]]|<br />
{{CalloutAnnotation| Double-click the ''Cost to Rent'' node to open the module.<br />
<br />
<br />
The ''Cost to Rent'' diagram opens (see the figure below). |v=0|pt=272,450|path=b!|n=+}}<br />
}}<br />
<br />
Analytica limits the number of open windows at each level of the model hierarchy to minimize clutter on your screen. See [[Managing windows]] in the [[Analytica User Guide]] for information on how to open more than one module [[Diagram window]] at a time.<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to return to the parent diagram, ''Model.'' |v=0|pt=5,35|path=*|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.20.png]]|<br />
{{CalloutAnnotation|<br />
Combined arrowhead⠀|Type=Bare|v=100|pt=472,160|path=r-}}<br />
}}<br />
<br />
The combined arrowhead, shown above, indicates that the node has one or more inputs from outside this module, plus the input variable in this module.<br />
<br />
You can also navigate the model by tracking a variable’s [[User input nodes and user output nodes|inputs or outputs]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.22.png]]|<br />
{{CalloutAnnotation|<br />
Select the ''Buying price'' node.|v=108|pt=58,138|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Select '''Outputs''' from the Attribute popup menu to view a list of variables that depend on the ''Buying price'' variable.|v=180|pt=270,379|path=*|n=+}}<br />
{{CalloutAnnotation|<br />
Double-click ''Insurance.''|v=330|pt=13,430|path=*|n=+}}<br />
}}<br />
<br />
The Out-of-pocket costs to own module diagram is brought to the front, with the Insurance node selected.<br />
<br />
==Learn about nodes using Help balloons==<br />
[[Help balloons]] pop up when you hover over a node for about a second, and display the title, units, and description for a variable. These allow you to browse information very rapidly without having to open the object window. Balloons do not appear when objects do not have the Help or Description attribute filled in.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.24.png]]|<br />
{{CalloutAnnotation|<br />
Hover the mouse over the node and wait for about 1 second.|v=45|pt=339,115|path=r-|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to view the ''Cost to buy'' diagram.|v=0|pt=5,30|path=*|n=+}}<br />
}}<br />
<br />
==Using Pop-up node controls==<br />
<br />
Pop-up node controls appear around a node, when you move the mouse cursor over a node and wait half a second, or when you click a node. Click on a pop-up control to open the Object Window, Result window, or Expression view for this Variable, or to open the Diagram for a Module node. See the User guide for a complete explanation [[Pop-up_node_controls]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.24-2.png]]|<br />
{{CalloutAnnotation|<br />
When you Hover the mouse over a node Popup node controls appear - usually before the help balloon (if present).|n=10|v=5|pt=250,137|path=r-}}{{CalloutAnnotation|<br />
When you Hover the mouse over the node Popup node controls appear - usually before the help balloon (if present).|n=10|v=5|pt=275,137|path=r-}}{{CalloutAnnotation|<br />
When you Hover the mouse over the node Popup node controls appear - usually before the help balloon (if present).|n=10|v=5|pt=300,137|path=r-}}<br />
}}<br />
<br />
==Inspect values in the Attribute panel==<br />
The [[Attribute panel]] allows you to view certain attributes, such as a variable’s '''''value''''', that are not (initially) displayed in an [[Object window]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.25.png]]|<br />
{{CalloutAnnotation|<br />
Select the ''Present value of buying'' node.|v=60|pt=339,103|path=r-|n=1}}<br />
{{CalloutAnnotation|<br />
Click the key icon to open the '''Attribute''' panel.|v=155|pt=18,516|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Press the Attribute popup menu and select '''Value'''.|v=275|pt=311,668|path=b!|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.26.png]]|<br />
{{CalloutAnnotation|<br />
The deterministic (or mid) value of ''Present value of buying displays'', in this case, -67.2K.|v=10}}<br />
}}<br />
<br />
If '''''Value '''''was not previously computed, Analytica computes the variable’s value '''''deterministically''''', assuming that all of the input probability distributions are fixed at their median values. [[Mid]] value is an abbreviation for this deterministically computed value.<br />
<br />
You can use the [[Attribute panel]] in this manner to examine the mid value of any variable in the model.<br />
<br />
It is faster to compute a mid (deterministic) value than an uncertain (probabilistic) value, so it is useful for conducting initial checks of a model before performing any uncertainty analysis.<br />
<br />
==Display results==<br />
When you are viewing a model’s [[Diagram window|influence diagram]], you can evaluate any variable and display its value in a [[Result window]].<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveResult.png]]|<br />
{{CalloutAnnotation|<br />
With ''Present value of buying'' still selected, click the '''Result''' button to evaluate it.|v=30|pt=215,50|path=r-|n=1}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.27.png]]|}}<br />
<br />
<br />
A [[Result window]] displays the [[Probability density and mass graphs|probability density function graph]] for this variable. Analytica displays the [[Uncertainty view of a result|uncertainty view]] that was most recently selected from the [[Uncertainty views|Uncertainty View]] popup menu, or that was saved with the model.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.29-updated.png]]|<br />
{{CalloutAnnotation|<br />
Click the close button to close the '''Result''' window.|v=150|pt=673,37|path=*|n=+}}<br />
}}<br />
<br />
<tip>The ''Rent vs. Buy ''model uses financial flow conventions: funds flowing in (received) have positive values; funds flowing out (expended) have negative values.</tip><br />
<br />
As an alternative to clicking the '''Result''' button [[File:Chapter 2.29.1.png]] and then selecting an uncertainty view, you can use the [[Result menu]] to evaluate a variable and select the [[Uncertainty view of a result|uncertainty view of the result]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.30.png]]|<br />
{{CalloutAnnotation|<br />
With ''Present value of buying'' still selected, select the '''Result''' menu. The check mark next to '''Probability Density''' indicates that the '''Probability Density''' was last displayed. Select '''Cumulative Probability'''.|v=5|pt=36,255|path=b!|n=+}}<br />
}}<br />
<br />
The [[Result window]] appears displaying the variable’s [[Distribution_Densities_Library#Cumulative_Probability_Functions|cumulative probability distribution]].<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to display the ''Cost to buy'' diagram. |v=40|pt=39,50|path=r-|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.33.png]]|<br />
{{CalloutAnnotation|<br />
Select ''Moving costs'' and then click the '''Result''' button to evaluate. |v=40|pt=215,47|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Select ''Moving costs'' and then click the '''Result''' button to evaluate. |v=40|pt=534,533|path=r-|n=5}}<br />
}}<br />
<br />
A single [[mid]] value appears in table view.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.34.png]]|<br />
{{CalloutAnnotation|<br />
Uncertainty View Popup Menu⠀|Type=Bare|v=38|pt=14,59|path=r-}}<br />
}}<br />
<br />
The [[mid]] value in [[Table view of a result|table view]] is the only result view available for a nonprobabilistic variable with a single value.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.35.png]]|<br />
{{CalloutAnnotation|<br />
Select '''Probability Mass''' from the Uncertainty View popup menu.|v=5|pt=34,172|path=b!|n=+}}<br />
}}<br />
<br />
Analytica tells you that this is a nonprobabilistic value.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.36.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''OK''' button.|v=5|pt=485,196|path=b!|n=+}}<br />
}}<br />
<br />
==Summary==<br />
You now have browsed the ''Rent vs. Buy'' model by examining its influence diagrams, variables, attributes, definitions, and results. These are the basic techniques for exploring any Analytica model.<br />
<br />
The next chapter shows you how to analyze the Rent vs. Buy model.<br />
<br />
You can quit Analytica at this point.<br />
<br />
<br><br />
==Tutorial Video - With An Old Version of Analytica ==<br />
<center><br />
<iframe width="640" height="360" src="https://www.youtube.com/embed/mpF4xcmKaao" frameborder="0" allowfullscreen></iframe><br />
<br />
'''Tutorial Video:''' [https://youtu.be/mpF4xcmKaao Review/explore a model] (8 minutes)<br />
</center><br />
<br />
<br><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=mpF4xcmKaao Exploring a model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[Examining a Model]]<br />
* [[Diagram window]]<br />
* [[Creating Lucid Influence Diagrams]]<br />
* [[Object Window]]<br />
* [[Classes of variables and other objects]]<br />
* [[Attributes]]<br />
* [[Attribute panel]]<br />
* [[Entering Attributes using the Attribute panel]]<br />
* [[Definitions]]<br />
* [[Import a module or library]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Help balloons]]<br />
* [[Result Tables and Graphs]]<br />
* [[Result window]]<br />
* [[Managing windows]]<br />
</div><br />
<br />
<br />
<footer>Tutorial: Open a model to browse/ {{PAGENAME}} / Tutorial: Analyzing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Reviewing_a_model&diff=60661Tutorial: Reviewing a model2024-04-24T17:38:31Z<p>Cclermont: </p>
<hr />
<div>[[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<br />
This Tutorial page shows you how to explore a model by examining the ''Rent vs. Buy'' model's:<br />
* Influence diagrams<br />
* Variables<br />
* Attributes<br />
* Definitions<br />
* Results<br />
<br />
This assumes you have started Analytica and have opened the ''Rent vs. Buy'' model. If this is not the case, see [[Tutorial: Open a model to browse#Opening_the_Rent_vs._Buy_model|Opening the Rent vs. Buy model]]. If you are using the model as modified from [[Tutorial: Open a model to browse|Chapter 1]], change the value of ''Time horizon ''back to '''10''', the value of ''Monthly rent ''back to '''1200''', and the value of ''Buying price ''back to '''140K'''. Also change the ''Rate of inflation ''back to a normal distribution with a mean of '''3.5 '''and a standard deviation of '''1.3'''.<br />
<br />
<div style="text-align: left;"><br />
<div style="column-count: 1; -moz-column-count: 1; -webkit-column-count: 1;"><br />
__TOC__<br />
</div><br />
</div><br />
<br />
==Recognize influence diagrams==<br />
In this chapter, you will delve into some of the details of the ''Rent vs. Buy'' model. You will not use the top diagram that you used in [[Tutorial: Open a model to browse|Chapter 1]].<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 2.1.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Model'' node to open it.|v=179|pt=250,215|path=r-|n=1}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Model'' node to open it.|v=480|pt=200,515|path=r-|n=1}}<br />
}}}}<br />
<br />
The details of an Analytica model display in an [[Diagram window|influence diagram window]]. An influence diagram (shown below) is a graphical representation of a model, showing how different variables in the model interact with each other. A typical influence diagram consists of a number of '''''nodes''''' connected by '''''arrows'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 2.2.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|<br />
Tools palette⠀|Type=Bare|v=4|pt=4,15|path=r-}}<br />
}}<br />
{{Release|5.0|6.3|{{CalloutAnnotationBlock|[[image:Chapter_2_2b.png]]|<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=58,138|path=r-}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=61,233|path=*}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=57,341|path=*}}<br />
{{CalloutAnnotation|<br />
Influence diagram window|Type=Bare|v=265|pt=23,285|path=r-}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter_2_2b_64.png]]|<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=58,138|path=r-}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=61,233|path=*}}<br />
{{CalloutAnnotation|<br />
Nodes⠀|Type=Bare|v=128|pt=57,341|path=*}}<br />
{{CalloutAnnotation|<br />
Influence diagram window|Type=Bare|v=265|pt=23,285|path=r-}}<br />
}}}}<br />
}}<br />
'''''Nodes''''' represent variables and appear as boxes, ovals, hexagons, and other shapes. Different node shapes represent different types of variables. Analytica uses the term '''''variable''''' broadly to include anything that has a value or can be evaluated. Note that many of the variables have the same names as the inputs and output at the top diagram that you used in [[Tutorial: Open a model to browse|Chapter 1]]. The top diagram provides an easy way to see and change these nodes’ values.<br />
<br />
'''''Arrows''''' connecting different variables indicate a relation between the variables. The arrow connecting ''Rate of inflation ''to ''Appreciation rate ''indicates that the value of the ''Appreciation rate ''variable depends on the value of the ''Rate of inflation ''variable. In the ''Rent vs. Buy ''model influence diagram, ''Cost to Buy ''depends on the ''Buying price'', ''Rate of inflation'', ''Appreciation rate'', ''Discount rate'', and ''Time horizon ''variables.<br />
<br />
The following figure illustrates different types of nodes.<br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 2.3.png]]}}<br />
{{Release|6.4||[[File:Chapter 2.3_64.png]]}}<br />
<br />
==Open Object windows==<br />
Every object in Analytica has an associated [[Object window]] containing detailed information about it. You can display the '''Object''' window of any variable by double-clicking its node in the [[Diagram window|influence diagram]].<br />
<br />
{{Release||6.3|{{CalloutAnnotationBlock|[[image:Chapter 2.4.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Buying price'' node to open the ''Buying price'' '''Object''' window.|v=92|pt=58,138|path=r-|n=1}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 2.4_64.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Buying price'' node to open the ''Buying price'' '''Object''' window.|v=92|pt=58,138|path=r-|n=1}}<br />
}}}}<br />
<br />
Information about a variable is provided in a list of attributes. [[Attributes]] include the variable’s class (for example, decision, chance, or constant), identifier, units, title, description, definition, inputs, and outputs. See the illustration below.<br />
<br />
:[[File:Chapter 2.5.png]]<br />
<br />
<tip>You can enter numbers with a suffix abbreviation, so Buying Price can be defined as either 140K or 140000. A quick reference for these suffixes is given on [[Number formats]] page.</tip><br />
<br />
==Move between Object windows==<br />
You have opened the [[Object window]] of a variable (''Buying price'') by double-clicking its node in the [[Diagram window|influence diagram]].<br />
<br />
The '''Object '''window contains a list of the variable’s '''''inputs '''''and '''''outputs''''', if there are any.<br />
<br />
You can open the [[Object window]] for any input or output variable by double-clicking the one you wish to view.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.6.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the output variable titled ''Mortgage loan amount.''|v=92|pt=166,436|path=b!|n=1}}<br />
}}<br />
<br />
Analytica opens the '''Object''' window for ''Mortgage loan amount''.<br />
<br />
:[[File:Chapter 2.7.png]]<br />
<br />
Note in the figure above that the '''''Title '''''of ''Mortgage loan amount ''is different from the variable’s [[identifier]], ''Mortgage''. The title is what the model user normally sees; the identifier is used as a mathematical symbol in the definitions of other variables that depend on this variable.<br />
<br />
The [[definition]] of the ''Mortgage loan amount ''is an [[Expressions|expression]], the sum of ''Buying price ''and ''Down payment ''(which is a negative amount). The definition refers to these variables by their identifiers.<br />
<br />
{{Release|5.4||}}<tip>The color of the text in the definition varies, to help you spot mistakes as you read or edit Definitions. See [[Syntax_coloring_and_fonts_and_error_underlining|Syntax coloring]] in the User Guide.</tip><br />
<br />
'''''Inputs '''''lists the identifiers and titles of the variables in the definition. ''Buying price'', the variable you just examined, is one of the inputs. The other input of ''Mortgage loan amount ''is ''Down payment''.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.8 6.0.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Down payment'' input.|v=140|pt=115,205|path=b!|n=+}}<br />
}}<br />
<br />
The [[Object window]] now displays the [[attributes]] of ''Down payment''.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.9 6.0.png]]|<br />
{{CalloutAnnotation|<br />
Click the close button to close the window and return to the diagram.|v=72|pt=660,34|path=r-|n=+}}<br />
}}<br />
<br />
==Use the Attribute panel==<br />
As an alternative to viewing a variable’s attributes in a separate window, you can inspect them in the [[Attribute panel]], which is an auxiliary window pane that you can open below the influence diagram.<br />
<br />
The [[Attribute panel]] allows you to rapidly examine one [[attributes|attribute]] at a time of any variable in the model. You select the variable you wish to view and select the attribute to examine from a popup menu.<br />
<br />
The variable ''Buying price ''should be highlighted with a title in white, indicating that it is selected; if it is not, select it by clicking it once.<br />
<br />
{{Release||6.3|{{CalloutAnnotationBlock|[[image:Chapter 2.4.png]]|<br />
{{CalloutAnnotation|<br />
Click the down arrow icon to open the '''Attribute''' panel.|v=400|pt=14,536|path=*|n=1}}<br />
}}}}<br />
{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 2.4_64.png]]|<br />
{{CalloutAnnotation|<br />
Click the down arrow icon to open the '''Attribute''' panel.|v=400|pt=14,536|path=*|n=1}}<br />
}}}}<br />
<br />
By default, Analytica displays the '''''description '''''of the selected node (e.g., ''Buying price'') in the [[Attribute panel]].<br />
<br />
:{{Release||6.3|[[File:Chapter 2.11.png]]}}<br />
{{Release|6.4||[[File:Chapter 2.11_6.4.png]]}}<br />
<br />
==Inspect definitions in the Attribute panel==<br />
The [[Attribute panel]] allows you to inspect any attribute of a variable.<br />
<br />
In this section, you will see the [[definition]] of two variables that you viewed in the top-level diagram in [[Tutorial: Open a model to browse|Chapter 1]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.12.png]]|<br />
{{CalloutAnnotation|<br />
Click '''Description''' to view the Attribute popup menu.|v=70|pt=315,45|path=r-|n=1}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.13.png]]|<br />
{{CalloutAnnotation|<br />
Select '''Definition''' as the new current attribute to display.|v=244|pt=297,281|path=r-|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.14.png]]|<br />
{{CalloutAnnotation|<br />
The definition of ''Buying price'' is displayed. It is a single number: 140K (140,000).|v=5|pt=15,38|path=*|n=+}}<br />
}}<br />
<br />
<br />
<!--Not since 4.5 When a variable is defined as an '''''uncertainty distribution''''', a button appears in the '''Definition''' field.--><br />
{{CalloutAnnotationBlock|{{Release||5.3|[[image:Chapter 2.15.png]]}}{{Release|5.4||[[image:Chapter 2.15 6.0.png]]}}|<br />
{{CalloutAnnotation| Select the ''Rate of inflation'' node.<br />
<br />
<br />
The definition in this example is a normal distribution; hence, the '''Normal''' function is shown.|v=15|pt=66,119|path=r-|n=+}}<br />
}}<br />
<br />
In [[Tutorial: Open a model to browse|Chapter 1]] you saw that ''Rate of inflation'' is defined as a [[normal]] distribution with a [[mean]] of 3.5 and a [[Sdeviation|standard deviation]] of 1.3.<br />
<br />
==Open modules==<br />
Analytica models generally contain '''''modules'''''. Each [[Modules and Libraries|module]] contains the details of a part of the model, also represented as an [[influence diagram]]. In the ''Rent vs. Buy'' model, ''Cost to Buy'' and ''Cost to Rent'' are both modules.<br />
<br />
Modules can also contain other modules. In this manner, a large model with hundreds of variables can be organized into a hierarchy of modules, each small enough to be easily understood.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.16.png]]|<br />
{{CalloutAnnotation|<br />
Double-click the ''Cost to Buy'' node to open the module.|v=112|pt=271,235|path=*|n=1}}<br />
}}<br />
<br />
Analytica displays the influence diagram of the ''Cost to Buy'' [[Modules and Libraries|module]]. This module contains three additional modules: ''Out-of-pocket costs to own, Future sales proceeds,'' and ''Opportunity cost''.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.17.png]]|<br />
{{CalloutAnnotation|<br />
Output arrowhead⠀|Type=Bare|v=78|pt=630,217|path=r-}}<br />
{{CalloutAnnotation|<br />
Input arrowhead⠀|Type=Bare|v=140|pt=25,234|path=b!}}<br />
}}<br />
<br />
The '''''input arrowhead''''' (without a trailing line) shows that the node to the right of the arrow has one or more inputs from outside this module.<br />
<br />
The '''''output arrowhead''''' shows that the node to the left of the arrow has one or more outputs outside this module.<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to return to the parent diagram, ''Model.'' |v=0|pt=5,35|path=*|n=+}}<br />
}}<br />
<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.19.png]]|<br />
{{CalloutAnnotation| Double-click the ''Cost to Rent'' node to open the module.<br />
<br />
<br />
The ''Cost to Rent'' diagram opens (see the figure below). |v=0|pt=272,450|path=b!|n=+}}<br />
}}<br />
<br />
Analytica limits the number of open windows at each level of the model hierarchy to minimize clutter on your screen. See [[Managing windows]] in the [[Analytica User Guide]] for information on how to open more than one module [[Diagram window]] at a time.<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to return to the parent diagram, ''Model.'' |v=0|pt=5,35|path=*|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.20.png]]|<br />
{{CalloutAnnotation|<br />
Combined arrowhead⠀|Type=Bare|v=100|pt=472,160|path=r-}}<br />
}}<br />
<br />
The combined arrowhead, shown above, indicates that the node has one or more inputs from outside this module, plus the input variable in this module.<br />
<br />
You can also navigate the model by tracking a variable’s [[User input nodes and user output nodes|inputs or outputs]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.22.png]]|<br />
{{CalloutAnnotation|<br />
Select the ''Buying price'' node.|v=108|pt=58,138|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Select '''Outputs''' from the Attribute popup menu to view a list of variables that depend on the ''Buying price'' variable.|v=180|pt=270,379|path=*|n=+}}<br />
{{CalloutAnnotation|<br />
Double-click ''Insurance.''|v=330|pt=13,430|path=*|n=+}}<br />
}}<br />
<br />
The Out-of-pocket costs to own module diagram is brought to the front, with the Insurance node selected.<br />
<br />
==Learn about nodes using Help balloons==<br />
[[Help balloons]] pop up when you hover over a node for about a second, and display the title, units, and description for a variable. These allow you to browse information very rapidly without having to open the object window. Balloons do not appear when objects do not have the Help or Description attribute filled in.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.24.png]]|<br />
{{CalloutAnnotation|<br />
Hover the mouse over the node and wait for about 1 second.|v=45|pt=339,115|path=r-|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to view the ''Cost to buy'' diagram.|v=0|pt=5,30|path=*|n=+}}<br />
}}<br />
<br />
==Using Pop-up node controls==<br />
<br />
Pop-up node controls appear around a node, when you move the mouse cursor over a node and wait half a second, or when you click a node. Click on a pop-up control to open the Object Window, Result window, or Expression view for this Variable, or to open the Diagram for a Module node. See the User guide for a complete explanation [[Pop-up_node_controls]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.24-2.png]]|<br />
{{CalloutAnnotation|<br />
When you Hover the mouse over a node Popup node controls appear - usually before the help balloon (if present).|n=10|v=5|pt=250,137|path=r-}}{{CalloutAnnotation|<br />
When you Hover the mouse over the node Popup node controls appear - usually before the help balloon (if present).|n=10|v=5|pt=275,137|path=r-}}{{CalloutAnnotation|<br />
When you Hover the mouse over the node Popup node controls appear - usually before the help balloon (if present).|n=10|v=5|pt=300,137|path=r-}}<br />
}}<br />
<br />
==Inspect values in the Attribute panel==<br />
The [[Attribute panel]] allows you to view certain attributes, such as a variable’s '''''value''''', that are not (initially) displayed in an [[Object window]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.25.png]]|<br />
{{CalloutAnnotation|<br />
Select the ''Present value of buying'' node.|v=60|pt=339,103|path=r-|n=1}}<br />
{{CalloutAnnotation|<br />
Click the key icon to open the '''Attribute''' panel.|v=155|pt=18,516|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Press the Attribute popup menu and select '''Value'''.|v=275|pt=311,668|path=b!|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.26.png]]|<br />
{{CalloutAnnotation|<br />
The deterministic (or mid) value of ''Present value of buying displays'', in this case, -67.2K.|v=10}}<br />
}}<br />
<br />
If '''''Value '''''was not previously computed, Analytica computes the variable’s value '''''deterministically''''', assuming that all of the input probability distributions are fixed at their median values. [[Mid]] value is an abbreviation for this deterministically computed value.<br />
<br />
You can use the [[Attribute panel]] in this manner to examine the mid value of any variable in the model.<br />
<br />
It is faster to compute a mid (deterministic) value than an uncertain (probabilistic) value, so it is useful for conducting initial checks of a model before performing any uncertainty analysis.<br />
<br />
==Display results==<br />
When you are viewing a model’s [[Diagram window|influence diagram]], you can evaluate any variable and display its value in a [[Result window]].<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveResult.png]]|<br />
{{CalloutAnnotation|<br />
With ''Present value of buying'' still selected, click the '''Result''' button to evaluate it.|v=30|pt=215,50|path=r-|n=1}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.27.png]]|}}<br />
<br />
<br />
A [[Result window]] displays the [[Probability density and mass graphs|probability density function graph]] for this variable. Analytica displays the [[Uncertainty view of a result|uncertainty view]] that was most recently selected from the [[Uncertainty views|Uncertainty View]] popup menu, or that was saved with the model.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.29-updated.png]]|<br />
{{CalloutAnnotation|<br />
Click the close button to close the '''Result''' window.|v=150|pt=673,37|path=*|n=+}}<br />
}}<br />
<br />
<tip>The ''Rent vs. Buy ''model uses financial flow conventions: funds flowing in (received) have positive values; funds flowing out (expended) have negative values.</tip><br />
<br />
As an alternative to clicking the '''Result''' button [[File:Chapter 2.29.1.png]] and then selecting an uncertainty view, you can use the [[Result menu]] to evaluate a variable and select the [[Uncertainty view of a result|uncertainty view of the result]].<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.30.png]]|<br />
{{CalloutAnnotation|<br />
With ''Present value of buying'' still selected, select the '''Result''' menu. The check mark next to '''Probability Density''' indicates that the '''Probability Density''' was last displayed. Select '''Cumulative Probability'''.|v=5|pt=36,255|path=b!|n=+}}<br />
}}<br />
<br />
The [[Result window]] appears displaying the variable’s [[Distribution_Densities_Library#Cumulative_Probability_Functions|cumulative probability distribution]].<br />
<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0_ActiveDiagram.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' button to display the ''Cost to buy'' diagram. |v=40|pt=39,50|path=r-|n=+}}<br />
}}<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.33.png]]|<br />
{{CalloutAnnotation|<br />
Select ''Moving costs'' and then click the '''Result''' button to evaluate. |v=40|pt=215,47|path=r-|n=+}}<br />
{{CalloutAnnotation|<br />
Select ''Moving costs'' and then click the '''Result''' button to evaluate. |v=40|pt=534,533|path=r-|n=5}}<br />
}}<br />
<br />
A single [[mid]] value appears in table view.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.34.png]]|<br />
{{CalloutAnnotation|<br />
Uncertainty View Popup Menu⠀|Type=Bare|v=38|pt=14,59|path=r-}}<br />
}}<br />
<br />
The [[mid]] value in [[Table view of a result|table view]] is the only result view available for a nonprobabilistic variable with a single value.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.35.png]]|<br />
{{CalloutAnnotation|<br />
Select '''Probability Mass''' from the Uncertainty View popup menu.|v=5|pt=34,172|path=b!|n=+}}<br />
}}<br />
<br />
Analytica tells you that this is a nonprobabilistic value.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 2.36.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''OK''' button.|v=5|pt=485,196|path=b!|n=+}}<br />
}}<br />
<br />
==Summary==<br />
You now have browsed the ''Rent vs. Buy'' model by examining its influence diagrams, variables, attributes, definitions, and results. These are the basic techniques for exploring any Analytica model.<br />
<br />
The next chapter shows you how to analyze the Rent vs. Buy model.<br />
<br />
You can quit Analytica at this point.<br />
<br />
<br><br />
==Tutorial Video - With An Old Version of Analytica ==<br />
<center><br />
<iframe width="640" height="360" src="https://www.youtube.com/embed/mpF4xcmKaao" frameborder="0" allowfullscreen></iframe><br />
<br />
'''Tutorial Video:''' [https://youtu.be/mpF4xcmKaao Review/explore a model] (8 minutes)<br />
</center><br />
<br />
<br><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=mpF4xcmKaao Exploring a model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[Examining a Model]]<br />
* [[Diagram window]]<br />
* [[Creating Lucid Influence Diagrams]]<br />
* [[Object Window]]<br />
* [[Classes of variables and other objects]]<br />
* [[Attributes]]<br />
* [[Attribute panel]]<br />
* [[Entering Attributes using the Attribute panel]]<br />
* [[Definitions]]<br />
* [[Import a module or library]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Help balloons]]<br />
* [[Result Tables and Graphs]]<br />
* [[Result window]]<br />
* [[Managing windows]]<br />
</div><br />
<br />
<br />
<footer>Tutorial: Open a model to browse/ {{PAGENAME}} / Tutorial: Analyzing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60605Tutorial: Open a model to browse2024-04-15T15:44:24Z<p>Cclermont: </p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<span style="font-size: large; font-weight: bold;">This simple tutorial shows you how to explore a small Analytica model.</span><br />
<br />
<br />
<span style="font-size: large;">It will help you get a feel for how Analytica works!</span><br />
<br />
<br />
==Open the Rent vs. Buy model==<br />
Follow these steps:<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60604Tutorial: Open a model to browse2024-04-15T15:43:09Z<p>Cclermont: </p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<center><span style="font-size: large; font-style: italic; font-weight: bold;">This simple tutorial shows you how to explore a small Analytica model.</span></center><br />
<br />
<br />
<span style="font-size: large; font-style: italic;">It will help you get a feel for how Analytica works!</span><br />
<br />
<br />
==Open the Rent vs. Buy model==<br />
Follow these steps:<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60570Tutorial: Open a model to browse2024-04-09T13:59:10Z<p>Cclermont: </p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<center><span style="font-size: x-large; font-style: italic; font-weight: bold;">This simple tutorial shows you how to explore a small Analytica model.</span></center><br />
<br />
<br />
<center><span style="font-size: x-large; font-style: italic;">It will help you get a feel for how Analytica works!</span></center><br />
<br />
<br />
<center><span style="font-size: x-large; font-style: italic;">Estimated time: 10 min</span></center><br />
<br />
==Open the Rent vs. Buy model==<br />
Follow these steps:<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60569Tutorial: Open a model to browse2024-04-09T13:57:13Z<p>Cclermont: </p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<center><span style="font-size: x-large; font-style: italic; font-weight: bold;">This simple tutorial shows you how to explore an Analytica model: Rent vs Buy</span></center><br />
<br />
<br />
<center><span style="font-size: x-large; font-style: italic;">It will help you get a feel for how Analytica works.</span></center><br />
<br />
<br />
<center><span style="font-size: x-large; font-style: italic;">Estimated time: 10 min</span></center><br />
<br />
==Open the Rent vs. Buy model==<br />
Follow these steps:<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60568Tutorial: Open a model to browse2024-04-09T13:55:36Z<p>Cclermont: </p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<center><span style="font-size: x-large; font-style: italic; font-weight: bold;">This simple tutorial shows you how to explore an Analytica model: Rent vs Buy</span></center><br />
<br />
<br />
<center><span style="font-size: larger; font-style: italic;">It will help you get a feel for how Analytica works.</span></center><br />
<center><span style="font-size: larger; font-style: italic;">Estimated time: 10 min</span></center><br />
<br />
==Open the Rent vs. Buy model==<br />
Follow these steps:<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60567Tutorial: Open a model to browse2024-04-09T13:47:07Z<p>Cclermont: Undo revision 60566 by Cclermont (talk)</p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
This simple tutorial shows you how to explore an Analytica model: Rent vs Buy<br />
<br />
It will help you get a feel for how Analytica works.<br />
<br />
Time: 10 min<br />
<br />
==Open the Rent vs. Buy model==<br />
Follow these steps:<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60566Tutorial: Open a model to browse2024-04-09T13:46:24Z<p>Cclermont: </p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<center>''==This simple tutorial shows you how to explore an Analytica model: Rent vs Buy==<br />
==It will help you get a feel for how Analytica works.==<br />
==Time: 10 min==''</center><br />
<br />
==Open the Rent vs. Buy model==<br />
Follow these steps:<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60565Tutorial: Open a model to browse2024-04-09T13:32:54Z<p>Cclermont: </p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
This simple tutorial shows you how to explore an Analytica model: Rent vs Buy<br />
<br />
It will help you get a feel for how Analytica works.<br />
<br />
Time: 10 min<br />
<br />
==Open the Rent vs. Buy model==<br />
Follow these steps:<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60564Tutorial: Open a model to browse2024-04-09T13:32:26Z<p>Cclermont: </p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<br />
This simple tutorial shows you how to explore an Analytica model: Rent vs Buy<br />
<br />
It will help you get a feel for how Analytica works.<br />
<br />
Time: 10 min<br />
<br />
==Open the Rent vs. Buy model==<br />
Follow these steps:<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60563Tutorial: Open a model to browse2024-04-09T13:29:26Z<p>Cclermont: </p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<br />
This Tutorial page shows you how to open and explore an example Analytica model: <br />
<br />
The very simplistic tutorial model ''Rent vs. Buy''' compares the cost of renting a house to the cost of buying. <br />
<br />
We strongly encourage you to download the model and follow these simple instructions to get a feel for how Analytica works.<br />
<br />
==Open the Rent vs. Buy model==<br />
Follow these steps:<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60562Tutorial: Open a model to browse2024-04-09T13:23:47Z<p>Cclermont: Undo revision 60559 by Cclermont (talk)</p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<br />
This Tutorial page shows you how to open and explore an example Analytica model: The '''Rent vs. Buy model''' compares the total cost of renting a house to the cost of buying one. <br />
<br />
You can start by viewing this video, or jump straight into starting up the model in Analytica. <br />
<br />
<br><br />
<center><br />
<iframe width="560" height="315" src="https://www.youtube.com/embed/WEh1lRUj5tM" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen=""></iframe><br />
<br />
'''Video:''' [https://youtu.be/WEh1lRUj5tM Tutorial: Open a model to browse] (8 minutes)<br />
</center><br />
<br><br />
<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
__TOC__<br />
</div><br />
<br />
==Open the Rent vs. Buy model==<br />
To begin, follow these steps.<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60561Tutorial: Open a model to browse2024-04-09T13:22:43Z<p>Cclermont: Undo revision 60560 by Cclermont (talk)</p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<br />
This Tutorial page shows you how to open and explore an example Analytica model: The '''Rent vs. Buy model''' compares the total cost of renting a house to the cost of buying one. <br />
<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
__TOC__<br />
</div><br />
<br />
==Open the Rent vs. Buy model==<br />
To begin, follow these steps.<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60560Tutorial: Open a model to browse2024-04-09T13:20:42Z<p>Cclermont: </p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
This Tutorial page shows you how to open and explore an example Analytica model: <br />
<br />
The very simple example model '''Rent vs. Buy''' compares the total cost of renting a house to the cost of buying one. <br />
<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
__TOC__<br />
</div><br />
<br />
==Open the Rent vs. Buy model==<br />
To begin, follow these steps.<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Tutorial:_Open_a_model_to_browse&diff=60559Tutorial: Open a model to browse2024-04-09T13:15:03Z<p>Cclermont: </p>
<hr />
<div> [[Category:Analytica Tutorial]]<br />
[[Category: Rent vs. Buy model]]<br />
<breadcrumbs>Analytica Tutorial > {{PAGENAME}}</breadcrumbs><br />
{{ReleaseBar}}<br />
<br />
This Tutorial page shows you how to open and explore an example Analytica model: The '''Rent vs. Buy model''' compares the total cost of renting a house to the cost of buying one. <br />
<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
__TOC__<br />
</div><br />
<br />
==Open the Rent vs. Buy model==<br />
To begin, follow these steps.<br />
<br />
# You start Analytica like any Windows application: For example, click the '''Start''' button on the Windows taskbar. Click {{Release|5.0|6.3|'''All Programs'''}}{{Release|6.4||'''All Apps'''}} &rarr; '''Analytica {{#svarget:anarelease|4.6}}''' &rarr; '''Analytica {{#svarget:anarelease|4.6}}'''. <br>{{Release||4.6|[[File:Chapter 1.1.png|300px]]}}{{Release|5.0|5.4|[[File:Launch Ana5.0 from Start Menu.png|300px]]}}{{Release|6.0|6.3|[[File:Launch Ana6.0 from Start Menu.png]]}}{{Release|6.4||[[File:Launch Ana6.4 from Start Menu.png]]}}<br />
# After Analytica starts, {{Release||4.6|<br />
select '''File''' &rarr; '''Open''' from the menu.<br />
# <br> [[File:Chapter 1.2a.png]]<br />
# Open the Rent vs. Buy model. <br> [[File:Chapter 1.2b.png]] <br> Analytica reads in the Rent vs. Buy model.<br />
}}{{Release|5.0|5.4|<br />
select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
[[File:Open Buy vs Rent Example.png]]<br />
}}{{Release|6.0|6.3|select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.0.png]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
Example model|v=451|pt=34,531|path=b(*,531)}}}}}}<br />
{{Release|6.4||select the ''Rent vs. Buy Example'' on the [[Intro screen]].<br /><br />
{{CalloutAnnotationBlock|[[File:Open Buy vs Rent Example6.4.png|800px]]|{{CalloutAnnotation|Click the Rent vs Buy<br /><br />
example model|v=400|pt=45,500|path=b(*,500)}}}}}}<br />
<br />
==The Diagram window==<br />
When you open a model, Analytica first displays a top-level [[Diagram window]]. A diagram is a graphical user interface that displays user inputs and outputs, influence diagrams, pictures, and other visual elements and controls, and is designed by the author of the model. The ''Rent vs. Buy'' model diagram shows several input variables that affect the trade-offs between renting and buying, '''Normal''' distribution buttons, a '''Calc''' button, and a node labeled Model.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=110|pt=215,129|path=r-}}<br />
{{CalloutAnnotation|<br />
User input |v=170|pt=215,175|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=230|pt=276,230|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=268|pt=412,262|path=r-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
User input |v=125|pt=331,130|path=r-}}<br />
{{CalloutAnnotation|<br />
Normal distrib. button|v=290|pt=331,295|path=r-}}<br />
{{CalloutAnnotation|<br />
Calc button to see results|v=430|pt=331,447|path=r-}}<br />
{{CalloutAnnotation|<br />
Model node|v=500|pt=200,515|path=r-}}<br />
}}}}<br />
This top-level diagram is an end-user interface to the model itself, which is contained in the Model node. In this chapter, you use only the interface in this top level diagram; in the following chapters you will explore the model in more depth.<br />
<br />
Across the top of the screen is a [[toolbar|horizontal palette of buttons]]. This is called the '''''tools palette'''''.<br />
<br />
:{{Release||4.6|[[File:Chapter 1.4.png]]}}<br />
{{Release|5.0||<br />
{{CalloutAnnotationBlock|[[image:BrowseToolOnToolbar5.0.png]]|<br />
{{CalloutAnnotation|The browse tool|v=0|pt=267,33|path=bD10-}}}}<br />
}}<br />
<br />
When you first open the ''Rent vs. Buy'' model, the '''browse tool''' is highlighted on the palette. With the browse tool selected, the cursor looks like a hand [[File:Chapter 1.5.png|32px]] when it is over the diagram. The browse tool allows you to calculate the model, change input values, and examine — but not change — the structure of the model. <!-- [DP - need the edit mode for some of this page ] In this chapter, you only use the browse tool.--><br />
<br />
==Access Help Resources==<br />
<br />
At any time, you can press the ''F1'' key on the keyboard or use the '''Help''' menu to access Analytica’s help resources online. This menu includes links to this [[Analytica Tutorial|Tutorial]], the [[Analytica User Guide|User Guide]] and much more tips and reference material on this [[Analytica Wiki]]. <br />
<br />
==Compute output values==<br />
<br />
In the ''Rent vs. Buy'' model, the output value of interest is at the bottom, ''Present value of buying and renting''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.3.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=200|pt=413,265|path=bD20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.3v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compare the present value of buying and renting.|v=350|pt=331,447|path=bD20-|n=1}}<br />
}}}}<br />
<br />
The output value displays in a [[Result window]]. This '''Result''' window shows a graph of two '''''probability density''''' curves, one for buying and one for renting. In a probability density graph, the units of the vertical scale are chosen so that the total area under each curve is 1 (100%). 25μ corresponds to 25 x 10-6 or 0.000025.<br />
<br />
<tip>Numerical suffixes like μ and K are used extensively throughout Analytica. A quick reference for these suffixes is given in [[Number formats]] .</tip><br />
<br />
:{{Release|4.6|6.3|[[File:Chapter 1.7.png]]}}{{Release|6.4||[[File:Chapter 1.7v2.png]]}}<br />
<br />
Since the graph is of probability densities, both buying and renting have probabilistic, or uncertain, inputs. The probability density graph for each appear to be bell-shaped curves ([[normal]] distribution), although they appear a bit “noisy.”<br />
<br />
The graphs show that the cost of renting, given the model’s inputs, are between about $105,000 and $155,000 (the negative numbers mean cost — cash flowing out), while the cost of buying is between $115,000 and a gain of $75,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.8.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.8v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
'''''Note''': Your results can vary slightly, since the model is generating random inputs based on a normal distribution for the uncertainty of the rate of inflation and for the appreciation rate.''<br />
<br />
Click the model [[Diagram window]] to bring it to the front. Notice that the button next to ''Costs of buying and renting'' has changed to '''Result'''. The '''Result''' button indicates that the value has been computed; clicking the '''Result''' button re-displays the computed values.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=220|pt=413,265|path=bD15-}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
The '''Calc''' button has changed to '''Result'''.|v=400|pt=331,447|path=bD20-}}<br />
}}}}<br />
<br />
==Examine definition types in user input nodes==<br />
<br />
When you enter a value into a user input, you need to enter a value that is compatible with it's definition type. See more here...[[The_Expression_popup_menu|Expression popup menu]].<br />
<br />
Click the '''Time horizon''' node.<br/><br />
Press ''F4'' to bring up the object window.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8a.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=53|pt=44,90|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8av2.png]]|<br />
{{CalloutAnnotation|<br />
Click the Variable ''Time horizon'', then press F4.|v=89|pt=47,125|n=1}}<br />
}}}}<br />
<br />
Press ''F9'' to enter edit mode (otherwise the expression popup menu is disabled).<br />
<br />
Click on the Expression popup menu (here it has a numeric icon, since this input is restricted to numbers only). <br/><br />
Note that Number only is selected. If you attempt enter text into the input node you will get a warning.<br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8b.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=150|pt=280,263|path=rR10!|n=2}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8bv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Expression popup menu - Note that Number only is selected. |v=180|pt=220,293|path=rR10!|n=2}}<br />
}}}}<br />
<br />
Press ''F8'' to go back to Browse mode.<br />
<br />
Close the object window - click the object window icon at the top left of the object window and select '''Close''' from the popup menu. <br/><br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[File:Chapter1 8c.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=130|pt=212,156|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=317|pt=231,335|n=4}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[File:Chapter1 8cv2.png]]|<br />
{{CalloutAnnotation|<br />
Click on the Object window icon. |v=145|pt=110,171|n=3}}<br />
{{CalloutAnnotation|<br />
Select ''Close''. |v=298|pt=110,315|n=4}}<br />
}}}}<br />
<br />
==Change input values and recompute results==<br />
<br />
Now you will change some input values to the model and recompute the rent vs. buy comparison. You will change the values of ''Time horizon'', ''Monthly rent'', and ''Buying price''.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.9.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=50|pt=220,64|path=tU20-|n=1}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.9v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Time horizon''. Change the value to '''''7''''' and press ''Alt+Enter''.|v=127|pt=331,130|path=tU20-|n=1}}<br />
}}}}<br />
<br />
<tip>The main Enter key and the numeric keypad Enter key are not interchangeable. They have different functions in Analytica. Alt+Enter is equivalent to the numeric keypad Enter key.</tip><br />
<br />
As soon as you change an input, the '''Result''' button changes to a '''Calc''' button, indicating that ''Present value of buying and renting'' needs to be recomputed.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.10.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=170|pt=220,174|path=r-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.10v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Monthly rent''. Change the value to '''''1400''''' and press ''Alt+Enter''.|v=127|pt=331,160|path=r-|n=+}}<br />
}}}}<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.11.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=130|pt=510,65|path=tU100-|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.11v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the box next to ''Buying price''. Change the value to '''''180K''''' (or 180000) and press ''Alt+Enter''.|v=150|pt=331,197|path=r-|n=+}}<br />
}}}}<br />
<br />
Now you are ready to recompute to see the new results. <br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=140|pt=413,265|path=bD20-|n=+}}<br />
}}}}<br />
<!--Don't know what this is <br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.12v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Calc''' button to compute the comparison of the costs of buying to renting.|v=430|pt=331,447|path=r-|n=+}}<br />
}}}}--><br />
<br />
The graphs show that the cost of renting, given these changed inputs, is between $90,000 and $120,000, while the cost of buying is between $135,000 and a gain of $70,000.<br />
<br />
{{Release|4.6|6.3|{{CalloutAnnotationBlock|[[image:Chapter 1.13.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=80|pt=43,232|path=b!|n=+}}<br />
}}}}{{Release|6.4||{{CalloutAnnotationBlock|[[image:Chapter 1.13v2.png]]|<br />
{{CalloutAnnotation|<br />
Click the '''Diagram''' window to bring it to the front.|v=40|pt=30,140|path=b!|n=+}}<br />
}}}}<br />
<br />
==Save your model== <br />
If you want to save changes to your model, you can do so at this point. (For instructions on quitting without saving, see the next section).<br />
<br />
Since the Analytica folder in Program files is not writable by default to a non admin user, you have to be running Analytica as an admin to be able to save over the original model file.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.30.png]]|{{CalloutAnnotation|<br />
Click '''Save''' from the File menu.|v=220|pt=30,180}}}}<br />
<br />
If you wish to save your model as a different file, so that you do not change the original model, select '''Save As''' from the [[File menu]].<br />
<br />
==Quit Analytica==<br />
When you have finished using a model, you might want to quit Analytica.<br />
<br />
{{CalloutAnnotationBlock|[[image:Chapter 1.33.png]]|{{CalloutAnnotation|<br />
Click '''Exit''' from the File menu.|v=370|pt=20,540}}}}<br />
<br />
== Summary ==<br />
<br />
You have now opened an Analytica model, calculated and viewed the results, changes input values and probability distributions, and displayed the uncertain results in several ways. These are the basic techniques for using any quantitative model.<br />
<br />
After you create your own models, you might want to give them a top-level input and output diagram like the one used in this chapter. For information about customizing a model for end users, see [[Creating Interfaces for End Users]] in the [[Analytica User Guide]]. <br />
<br />
The next Tutorial page, shows how to navigate the details of the Rent vs. Buy model, exploring its structure and contents.<br />
<br />
==Notes==<br />
<references/><br />
<br />
==See Also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
* [https://www.analyticacloud.com/acp/Client/AcpClient.aspx?inviteId=3&inviteCode=221703&subName=acp%20demos Play the Rent vs. Buy model in Analytica Cloud Player] <br />
* [https://www.youtube.com/watch?v=GQV0dnDN0Q0 Using the Rent vs. Buy Model] (an explanatory video on YouTube)<br />
* [[Tutorial videos]]<br />
* [[To open or exit a model]]<br />
* [[Create and save a model]]<br />
* [[Tutorial: Create a model]]<br />
* [[Example Models]]<br />
* [[Example Models and Libraries]]<br />
* [[Diagram window]]<br />
* [[Help menu and documentation]]<br />
* [[User input nodes and user output nodes]]<br />
* [[Expressing Uncertainty]]<br />
* [[Uncertainty Setup dialog]]<br />
* [[Uncertainty view of a result]]<br />
</div><br />
<br />
<br />
<footer>Analytica Tutorial/ {{PAGENAME}} / Tutorial: Reviewing a model</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Analytica_Docs&diff=60541Analytica Docs2024-04-03T12:42:44Z<p>Cclermont: </p>
<hr />
<div>[[Category: Analytica Docs]]<br />
<div style="column-count: 3;-moz-column-count:3;-webkit-column-count:3"><br />
[https://analytica.com/why-analytica/what-is-analytica/ What is Analytica?]<br /><br />
[[What are these Analytica docs?]]<br /><br />
[[Open these docs from Analytica]]<br /><br />
[[What's new]] in the latest release?<br /><br />
[[Edit and improve these docs]]<br /><br />
<br />
<big>'''Learning Analytica'''</big><br /><br />
[https://analytica.com/products/free/ Download Analytica Free Edition]<br /><br />
[[Analytica Tutorial]]<br /><br />
[[Example Models]]<br /><br />
[[Excel and Analytica]]<br /><br />
[[Analytica in the Classroom]]<br /><br />
<br />
<big>'''Analytica Editions'''</big><br /><br />
[[Editions of Analytica|Compare editions]]<br /><br />
[[Free Edition]], [[Analytica Enterprise|Enterprise]], [[Analytica Optimizer Guide|Optimizer]]<br /><br />
[[Analytica Cloud Platform|Analytica Cloud Platform (ACP)]]<br /><br />
[[ADE User Guide|Analytica Decision Engine (ADE)]]<br /><br />
<br />
<big>'''Tips and references'''</big><br /><br />
[[Functions by category]]<br /><br />
[[Modelling Guide]]<br /><br />
[[Standard libraries]]<br /><br />
[[Additional libraries]]<br /><br />
[[:Category:Concepts|Key concepts]]<br /><br />
[[Special:Categories|All Categories]]<br /><br />
[[Techniques and technologies]]<br /><br />
[https://analytica.com/analytica-downloads/ Download Analytica and ADE]<br /><br />
<br />
[[File:Analytica cube illustrated.jpg]]<br /><br />
<br />
<big>'''[[Analytica User Guide]]'''</big> <br /><br />
[[Contents of User Guide|Contents in detail]]<br />
<br />
'''Analytica Basics'''<br /><br />
[[Introduction: About Analytica]]<br />
<br />[[Examining a Model]]<br />
<br />[[Result Tables and Graphs]]<br />
<br />[[Parametric analysis]]<br />
<br />[[Create and edit a model]]<br />
<br />[[Building Effective Models]]<br />
<br />[[Creating Lucid Influence Diagrams]]<br />
<br />[[Number and table formats]]<br />
<br/>[[Graphs]]<br />
<br />
'''Definitions and expressions'''<br /><br />
[[Definitions]]<br />
<br />[[Expressions|Numbers, Booleans, and expressions]]<br />
<br />[[Text, Date, Math, and Financial Functions]]<br />
<br />[[Dynamic Simulation]]<br />
<br />
'''Arrays and Indexes'''<br /><br />
[[Indexes and arrays: An introduction|Introducing Arrays]]<br /><br />
[[Intelligent Arrays]]<br /><br />
[[Arrays and Indexes]]<br /><br />
[[Array functions]]<br />
<br />
'''Uncertainty and statistics'''<br /><br />
[[Expressing Uncertainty]]<br />
<br />[[Probability Distributions]]<br />
<br />[[Statistics, Sensitivity, and Uncertainty Analysis]]<br />
<br />
'''User interfaces'''<br /><br />
[[Creating Interfaces for End Users|Interfaces for End Users]] <br /><br />
[[Analytica Cloud Platform (ACP)]]<br /><br />
<br />
'''Advanced features'''<br /><br />
[[Integration with data and applications]]<br />
<br />[[Working with Large Models]]<br />
<br />[[User-defined Functions and Libraries]]<br />
<br />[[Procedural Programming]]<br />
<br />
<big>'''[[Analytica Optimizer Guide]]'''<br /><br />
'''[[ADE User Guide|Analytica Decision Engine (ADE)]]'''</big><br />
<br /><br /><br />
<big>'''User community'''</big><br /><br />
[https://analytica.com/community/ Analytica User Forum]<br /><br />
<!--[https://www.linkedin.com/company/lumina-decision-systems/ Analytica Users group on LinkedIn]<br />--><br />
[http://analytica.com/blog Analytica Blog]<br /><br />
[[Job Postings| Jobs for Analytica experts]]<br /><br />
<!--:[[Beta Tester Page]] Try out [[Analytica 5.0]]. Become a beta tester. --><br />
[[Enhancement Requests for Analytica|Feature requests]]<br /><br />
[[Articles that refer to Analytica]]<br /><br />
</div></div>Cclermonthttps://docs.analytica.com/index.php?title=Analytica_Docs&diff=59750Analytica Docs2023-09-15T14:53:22Z<p>Cclermont: </p>
<hr />
<div>[[Category: Analytica Docs]]<br />
<div style="column-count: 3;-moz-column-count:3;-webkit-column-count:3"><br />
[https://lumina.com/why-analytica/what-is-analytica/ What is Analytica?]<br /><br />
[[What are these Analytica docs?]]<br /><br />
[[Open these docs from Analytica]]<br /><br />
[[What's new in Analytica 6.3?]]<br /><br />
[[Edit and improve these docs]]<br /><br />
<br />
<big>'''Learning Analytica'''</big><br /><br />
[https://Lumina.com/products/free/ Download Analytica Free Edition]<br /><br />
[[Analytica Tutorial]]<br /><br />
[[Example Models]]<br /><br />
[[Excel and Analytica]]<br /><br />
[[Tutorial videos]]<br /><br />
[[Analytica in the Classroom]]<br /><br />
<br />
<big>'''Analytica Editions'''</big><br /><br />
[[Editions of Analytica|Compare editions]]<br /><br />
[[Free Edition]], [[Analytica Enterprise|Enterprise]], [[Analytica Optimizer Guide|Optimizer]]<br /><br />
[[Analytica Cloud Platform|Analytica Cloud Platform (ACP)]]<br /><br />
[[ADE User Guide|Analytica Decision Engine (ADE)]]<br /><br />
<br />
<big>'''Tips and references'''</big><br /><br />
[[Functions by category]]<br /><br />
[[Modelling Guide]]<br /><br />
[[Standard libraries]]<br /><br />
[[Additional libraries]]<br /><br />
[[:Category:Concepts|Key concepts]]<br /><br />
[[Special:Categories|All Categories]]<br /><br />
[[Techniques and technologies]]<br /><br />
[http://www.lumina.com/support/downloads/ Download Analytica and ADE]<br /><br />
<br />
[[File:Analytica cube illustrated.jpg]]<br /><br />
<br />
<big>'''[[Analytica User Guide]]'''</big> <br /><br />
[[Contents of User Guide|Contents in detail]]<br />
<br />
'''Analytica Basics'''<br /><br />
[[Introduction: About Analytica]]<br />
<br />[[Examining a Model]]<br />
<br />[[Result Tables and Graphs]]<br />
<br />[[Parametric analysis]]<br />
<br />[[Create and edit a model]]<br />
<br />[[Building Effective Models]]<br />
<br />[[Creating Lucid Influence Diagrams]]<br />
<br />[[Number and table formats]]<br />
<br/>[[Graphs]]<br />
<br />
'''Definitions and expressions'''<br /><br />
[[Definitions]]<br />
<br />[[Expressions|Numbers, Booleans, and expressions]]<br />
<br />[[Text, Date, Math, and Financial Functions]]<br />
<br />[[Dynamic Simulation]]<br />
<br />
'''Arrays and Indexes'''<br /><br />
[[Indexes and arrays: An introduction|Introducing Arrays]]<br /><br />
[[Intelligent Arrays]]<br /><br />
[[Arrays and Indexes]]<br /><br />
[[Array functions]]<br />
<br />
'''Uncertainty and statistics'''<br /><br />
[[Expressing Uncertainty]]<br />
<br />[[Probability Distributions]]<br />
<br />[[Statistics, Sensitivity, and Uncertainty Analysis]]<br />
<br />
'''User interfaces'''<br /><br />
[[Creating Interfaces for End Users|Interfaces for End Users]] <br /><br />
[[Analytica Cloud Platform (ACP)]]<br /><br />
<br />
'''Advanced features'''<br /><br />
[[Integration with data and applications]]<br />
<br />[[Working with Large Models]]<br />
<br />[[User-defined Functions and Libraries]]<br />
<br />[[Procedural Programming]]<br />
<br />
<big>'''[[Analytica Optimizer Guide]]'''<br /><br />
'''[[ADE User Guide|Analytica Decision Engine (ADE)]]'''</big><br />
<br /><br /><br />
<big>'''User community'''</big><br /><br />
[https://lumina.com/community/ Analytica User Forum]<br /><br />
<!--[https://www.linkedin.com/groups/1940454 Analytica Users group on LinkedIn]<br />--><br />
[http://blog.lumina.com/blog Lumina Blog]<br /><br />
[[Job Postings| Jobs for Analytica experts]]<br /><br />
<!--:[[Beta Tester Page]] Try out [[Analytica 5.0]]. Become a beta tester. --><br />
[[Enhancement Requests for Analytica|Feature requests]]<br /><br />
[[Articles that refer to Analytica]]<br /><br />
</div></div>Cclermonthttps://docs.analytica.com/index.php?title=Analytica_Free_Edition&diff=59707Analytica Free Edition2023-08-23T16:54:06Z<p>Cclermont: /* Big Announcement */</p>
<hr />
<div>[[Category:Analytica User Guide]]<br />
[[Category: Free Edition]]<br />
<br />
<breadcrumbs>Analytica User Guide > User Interfaces for End Users > {{PAGENAME}}</breadcrumbs><br />
<br />
==Model sharing options==<br />
When you distribute your model to others, one option is to provide them with your model file, and ensure that they have Analytica installed on their computer. To use the model, they’ll need to install the [[Analytica Free Edition]], [[Analytica Power Player]], or a full Analytica edition on their Windows-based computer. A second option is to publish your model to the [[Analytica Cloud Platform]] (ACP) and send them a URL to your model. When you do this, they only need a Flash-enabled web browser, and can view your model even from non-Windows computers. When you build a model with the intention of sharing it over the web, additional stylistic considerations, discussed below and in the next section, can have a big impact on usability.<br />
<br />
== Analytica Free Edition ==<br />
The Analytica Free edition allows users to browse existing models, change inputs, and evaluate and view results. When the model has more than 101 user objects, or is saved as browse only, users cannot make changes to the model except for changes variables with input nodes.<br />
<br />
=== Big Announcement ===<br />
Release 6.4 will support 1000 objects, OLE linking and multithreading!<br />
<br />
This will allow many models to be developed with the Free edition, but keep in mind it does not enable OpenAI, database access, huge indexes, Monte Carlo runs with more than 32000 iterations or optimization.<br />
<br />
To distribute your model to someone who already has Analytica installed, either the Free edition or another edition, you can simply attach the model to an email. When the user clicks on the attachment and selects '''Run''', the model opens in Analytica. You can also place the model on a web server with a hyperlink on web page using HTML such as: <br />
<br />
:<code>Please view <a href="myModel.ana">my Analytica model</a></code>. <br />
:<code>If you do not have Analytica installed on your computer, please <nowiki><a href="https://www.lumina.com/products/free101/"></nowiki>download and install Analytica Free Edition</a>first.</code><br />
<br />
When the user who has Analytica installed clicks on the model link, Analytica launches with the model loaded.<br />
<br />
When your model is spread across multiple linked modules, you will need to send all these module files to your end-user and have them save them all (usually in the same directory) before launching the main file. Be sure to tell them which model file is the top-level model that they should launch. To avoid the multiple-file complication, a better option is to save a copy of your model in a single file and send or post that single file (the linked-file structure is not preserved when you do this, hence, you send it as a copy). To do this, select '''File→ Save A Copy In... '''and check the '''Save everything in one file by embedding linked modules '''checkbox.<br />
<br />
Spreadsheet functions such as [[SpreadsheetOpen]](), [[SpreadsheetCell]](), etc., and [[OLE Linking]] are not available in Analytica Cloud Platform (ACP).<br />
<br />
==Testing in Free Edition ==<br />
To experience your model in the Analytica Free edition yourself before handing it off to your users, select '''Help &rarr; Update License...''', and select '''analytica_free '''from the '''License ID''' dropdown. After pressing OK, you’ll need to restart Analytica. Repeat the process to select your other license when you are finished. If you do this often, you may wish to create a Windows desktop shortcut to eliminate the need for the above steps. The shortcut should run the following command line:<br />
<br />
:<code>Analytica.exe /lic:analytica_free</code><br />
<br />
The Analytica Power Player provides users with the ability to utilize Enterprise-edition features. Although a Power Player is not free, it is less expensive than the license for a full Professional edition. If your users require live access to your ODBC databases, huge arrays, or the ability to save their inputs, then Power Player should be used. Optimizer-enabled Power Player licenses are also available.<br />
<br />
<br />
== Summary ==<br />
You can use input and output nodes to direct users of your model to relevant input and output variables. These nodes can be arranged into control panels for convenient presentation.<br />
<br />
Only variables with an associated input node can be modified by in browse-only mode by users of Analytica Free edition, Power Player or Analytica Cloud Platform.<br />
<br />
Analytica Free Edition is free to install, and hence provides way to share your models with others who do not have a licensed edition of Analytica. Power Player adds to this an ability to query databases, evaluate functions that require the Enterprise edition, and compute with huge indexes or sample sizes larger than 32000.<br />
<br />
==See Also==<br />
* [[Analytica User FAQs/Sharing Models]]<br />
* [[Free Edition]]<br />
* [https://www.lumina.com/products/free101/ Download Analytica Free Edition]<br />
* [[Analytica Cloud Platform (ACP)]]<br />
* [[Editions of Analytica]]<br />
<br />
<br />
<footer>Links or URL in model attributes / {{PAGENAME}} / Analytica Cloud Platform (ACP)</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Analytica_Free_Edition&diff=59706Analytica Free Edition2023-08-23T16:48:52Z<p>Cclermont: /* Big Announcement */</p>
<hr />
<div>[[Category:Analytica User Guide]]<br />
[[Category: Free Edition]]<br />
<br />
<breadcrumbs>Analytica User Guide > User Interfaces for End Users > {{PAGENAME}}</breadcrumbs><br />
<br />
==Model sharing options==<br />
When you distribute your model to others, one option is to provide them with your model file, and ensure that they have Analytica installed on their computer. To use the model, they’ll need to install the [[Analytica Free Edition]], [[Analytica Power Player]], or a full Analytica edition on their Windows-based computer. A second option is to publish your model to the [[Analytica Cloud Platform]] (ACP) and send them a URL to your model. When you do this, they only need a Flash-enabled web browser, and can view your model even from non-Windows computers. When you build a model with the intention of sharing it over the web, additional stylistic considerations, discussed below and in the next section, can have a big impact on usability.<br />
<br />
== Analytica Free Edition ==<br />
The Analytica Free edition allows users to browse existing models, change inputs, and evaluate and view results. When the model has more than 101 user objects, or is saved as browse only, users cannot make changes to the model except for changes variables with input nodes.<br />
<br />
=== Big Announcement ===<br />
Release 6.4 will support 1000 objects, OLE linking and multithreading!<br />
<br />
They also cannot utilize features that are not available with Analytica Professional, Enterprise or Optimizer such as OpenAI, database access, huge indexes, Monte Carlo runs with more than 32000 iterations or Optimization.<br />
<br />
To distribute your model to someone who already has Analytica installed, either the Free edition or another edition, you can simply attach the model to an email. When the user clicks on the attachment and selects '''Run''', the model opens in Analytica. You can also place the model on a web server with a hyperlink on web page using HTML such as: <br />
<br />
:<code>Please view <a href="myModel.ana">my Analytica model</a></code>. <br />
:<code>If you do not have Analytica installed on your computer, please <nowiki><a href="https://www.lumina.com/products/free101/"></nowiki>download and install Analytica Free Edition</a>first.</code><br />
<br />
When the user who has Analytica installed clicks on the model link, Analytica launches with the model loaded.<br />
<br />
When your model is spread across multiple linked modules, you will need to send all these module files to your end-user and have them save them all (usually in the same directory) before launching the main file. Be sure to tell them which model file is the top-level model that they should launch. To avoid the multiple-file complication, a better option is to save a copy of your model in a single file and send or post that single file (the linked-file structure is not preserved when you do this, hence, you send it as a copy). To do this, select '''File→ Save A Copy In... '''and check the '''Save everything in one file by embedding linked modules '''checkbox.<br />
<br />
Spreadsheet functions such as [[SpreadsheetOpen]](), [[SpreadsheetCell]](), etc., and [[OLE Linking]] are not available in Analytica Cloud Platform (ACP).<br />
<br />
==Testing in Free Edition ==<br />
To experience your model in the Analytica Free edition yourself before handing it off to your users, select '''Help &rarr; Update License...''', and select '''analytica_free '''from the '''License ID''' dropdown. After pressing OK, you’ll need to restart Analytica. Repeat the process to select your other license when you are finished. If you do this often, you may wish to create a Windows desktop shortcut to eliminate the need for the above steps. The shortcut should run the following command line:<br />
<br />
:<code>Analytica.exe /lic:analytica_free</code><br />
<br />
The Analytica Power Player provides users with the ability to utilize Enterprise-edition features. Although a Power Player is not free, it is less expensive than the license for a full Professional edition. If your users require live access to your ODBC databases, huge arrays, or the ability to save their inputs, then Power Player should be used. Optimizer-enabled Power Player licenses are also available.<br />
<br />
<br />
== Summary ==<br />
You can use input and output nodes to direct users of your model to relevant input and output variables. These nodes can be arranged into control panels for convenient presentation.<br />
<br />
Only variables with an associated input node can be modified by in browse-only mode by users of Analytica Free edition, Power Player or Analytica Cloud Platform.<br />
<br />
Analytica Free Edition is free to install, and hence provides way to share your models with others who do not have a licensed edition of Analytica. Power Player adds to this an ability to query databases, evaluate functions that require the Enterprise edition, and compute with huge indexes or sample sizes larger than 32000.<br />
<br />
==See Also==<br />
* [[Analytica User FAQs/Sharing Models]]<br />
* [[Free Edition]]<br />
* [https://www.lumina.com/products/free101/ Download Analytica Free Edition]<br />
* [[Analytica Cloud Platform (ACP)]]<br />
* [[Editions of Analytica]]<br />
<br />
<br />
<footer>Links or URL in model attributes / {{PAGENAME}} / Analytica Cloud Platform (ACP)</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Analytica_Free_Edition&diff=59705Analytica Free Edition2023-08-23T16:46:31Z<p>Cclermont: /* Big Announcement */</p>
<hr />
<div>[[Category:Analytica User Guide]]<br />
[[Category: Free Edition]]<br />
<br />
<breadcrumbs>Analytica User Guide > User Interfaces for End Users > {{PAGENAME}}</breadcrumbs><br />
<br />
==Model sharing options==<br />
When you distribute your model to others, one option is to provide them with your model file, and ensure that they have Analytica installed on their computer. To use the model, they’ll need to install the [[Analytica Free Edition]], [[Analytica Power Player]], or a full Analytica edition on their Windows-based computer. A second option is to publish your model to the [[Analytica Cloud Platform]] (ACP) and send them a URL to your model. When you do this, they only need a Flash-enabled web browser, and can view your model even from non-Windows computers. When you build a model with the intention of sharing it over the web, additional stylistic considerations, discussed below and in the next section, can have a big impact on usability.<br />
<br />
== Analytica Free Edition ==<br />
The Analytica Free edition allows users to browse existing models, change inputs, and evaluate and view results. When the model has more than 101 user objects, or is saved as browse only, users cannot make changes to the model except for changes variables with input nodes.<br />
<br />
=== Big Announcement ===<br />
Release 6.4 will support 1000 objects, OLE linking and multithreading!<br />
<br />
They also cannot utilize features that are not available with Analytica Professional, Enterprise or Optimizer such as OpenAI, database access, huge indexes, or Monte Carlo runs with more than 32000 iterations (see [[Analytica Enterprise]]).<br />
<br />
To distribute your model to someone who already has Analytica installed, either the Free edition or another edition, you can simply attach the model to an email. When the user clicks on the attachment and selects '''Run''', the model opens in Analytica. You can also place the model on a web server with a hyperlink on web page using HTML such as: <br />
<br />
:<code>Please view <a href="myModel.ana">my Analytica model</a></code>. <br />
:<code>If you do not have Analytica installed on your computer, please <nowiki><a href="https://www.lumina.com/products/free101/"></nowiki>download and install Analytica Free Edition</a>first.</code><br />
<br />
When the user who has Analytica installed clicks on the model link, Analytica launches with the model loaded.<br />
<br />
When your model is spread across multiple linked modules, you will need to send all these module files to your end-user and have them save them all (usually in the same directory) before launching the main file. Be sure to tell them which model file is the top-level model that they should launch. To avoid the multiple-file complication, a better option is to save a copy of your model in a single file and send or post that single file (the linked-file structure is not preserved when you do this, hence, you send it as a copy). To do this, select '''File→ Save A Copy In... '''and check the '''Save everything in one file by embedding linked modules '''checkbox.<br />
<br />
Spreadsheet functions such as [[SpreadsheetOpen]](), [[SpreadsheetCell]](), etc., and [[OLE Linking]] are not available in Analytica Cloud Platform (ACP).<br />
<br />
==Testing in Free Edition ==<br />
To experience your model in the Analytica Free edition yourself before handing it off to your users, select '''Help &rarr; Update License...''', and select '''analytica_free '''from the '''License ID''' dropdown. After pressing OK, you’ll need to restart Analytica. Repeat the process to select your other license when you are finished. If you do this often, you may wish to create a Windows desktop shortcut to eliminate the need for the above steps. The shortcut should run the following command line:<br />
<br />
:<code>Analytica.exe /lic:analytica_free</code><br />
<br />
The Analytica Power Player provides users with the ability to utilize Enterprise-edition features. Although a Power Player is not free, it is less expensive than the license for a full Professional edition. If your users require live access to your ODBC databases, huge arrays, or the ability to save their inputs, then Power Player should be used. Optimizer-enabled Power Player licenses are also available.<br />
<br />
<br />
== Summary ==<br />
You can use input and output nodes to direct users of your model to relevant input and output variables. These nodes can be arranged into control panels for convenient presentation.<br />
<br />
Only variables with an associated input node can be modified by in browse-only mode by users of Analytica Free edition, Power Player or Analytica Cloud Platform.<br />
<br />
Analytica Free Edition is free to install, and hence provides way to share your models with others who do not have a licensed edition of Analytica. Power Player adds to this an ability to query databases, evaluate functions that require the Enterprise edition, and compute with huge indexes or sample sizes larger than 32000.<br />
<br />
==See Also==<br />
* [[Analytica User FAQs/Sharing Models]]<br />
* [[Free Edition]]<br />
* [https://www.lumina.com/products/free101/ Download Analytica Free Edition]<br />
* [[Analytica Cloud Platform (ACP)]]<br />
* [[Editions of Analytica]]<br />
<br />
<br />
<footer>Links or URL in model attributes / {{PAGENAME}} / Analytica Cloud Platform (ACP)</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Analytica_Free_Edition&diff=59704Analytica Free Edition2023-08-23T16:46:12Z<p>Cclermont: /* Big Announcement */</p>
<hr />
<div>[[Category:Analytica User Guide]]<br />
[[Category: Free Edition]]<br />
<br />
<breadcrumbs>Analytica User Guide > User Interfaces for End Users > {{PAGENAME}}</breadcrumbs><br />
<br />
==Model sharing options==<br />
When you distribute your model to others, one option is to provide them with your model file, and ensure that they have Analytica installed on their computer. To use the model, they’ll need to install the [[Analytica Free Edition]], [[Analytica Power Player]], or a full Analytica edition on their Windows-based computer. A second option is to publish your model to the [[Analytica Cloud Platform]] (ACP) and send them a URL to your model. When you do this, they only need a Flash-enabled web browser, and can view your model even from non-Windows computers. When you build a model with the intention of sharing it over the web, additional stylistic considerations, discussed below and in the next section, can have a big impact on usability.<br />
<br />
== Analytica Free Edition ==<br />
The Analytica Free edition allows users to browse existing models, change inputs, and evaluate and view results. When the model has more than 101 user objects, or is saved as browse only, users cannot make changes to the model except for changes variables with input nodes.<br />
<br />
= Big Announcement =<br />
Release 6.4 will support 1000 objects, OLE linking and multithreading!<br />
<br />
They also cannot utilize features that are not available with Analytica Professional, Enterprise or Optimizer such as OpenAI, database access, huge indexes, or Monte Carlo runs with more than 32000 iterations (see [[Analytica Enterprise]]).<br />
<br />
To distribute your model to someone who already has Analytica installed, either the Free edition or another edition, you can simply attach the model to an email. When the user clicks on the attachment and selects '''Run''', the model opens in Analytica. You can also place the model on a web server with a hyperlink on web page using HTML such as: <br />
<br />
:<code>Please view <a href="myModel.ana">my Analytica model</a></code>. <br />
:<code>If you do not have Analytica installed on your computer, please <nowiki><a href="https://www.lumina.com/products/free101/"></nowiki>download and install Analytica Free Edition</a>first.</code><br />
<br />
When the user who has Analytica installed clicks on the model link, Analytica launches with the model loaded.<br />
<br />
When your model is spread across multiple linked modules, you will need to send all these module files to your end-user and have them save them all (usually in the same directory) before launching the main file. Be sure to tell them which model file is the top-level model that they should launch. To avoid the multiple-file complication, a better option is to save a copy of your model in a single file and send or post that single file (the linked-file structure is not preserved when you do this, hence, you send it as a copy). To do this, select '''File→ Save A Copy In... '''and check the '''Save everything in one file by embedding linked modules '''checkbox.<br />
<br />
Spreadsheet functions such as [[SpreadsheetOpen]](), [[SpreadsheetCell]](), etc., and [[OLE Linking]] are not available in Analytica Cloud Platform (ACP).<br />
<br />
==Testing in Free Edition ==<br />
To experience your model in the Analytica Free edition yourself before handing it off to your users, select '''Help &rarr; Update License...''', and select '''analytica_free '''from the '''License ID''' dropdown. After pressing OK, you’ll need to restart Analytica. Repeat the process to select your other license when you are finished. If you do this often, you may wish to create a Windows desktop shortcut to eliminate the need for the above steps. The shortcut should run the following command line:<br />
<br />
:<code>Analytica.exe /lic:analytica_free</code><br />
<br />
The Analytica Power Player provides users with the ability to utilize Enterprise-edition features. Although a Power Player is not free, it is less expensive than the license for a full Professional edition. If your users require live access to your ODBC databases, huge arrays, or the ability to save their inputs, then Power Player should be used. Optimizer-enabled Power Player licenses are also available.<br />
<br />
<br />
== Summary ==<br />
You can use input and output nodes to direct users of your model to relevant input and output variables. These nodes can be arranged into control panels for convenient presentation.<br />
<br />
Only variables with an associated input node can be modified by in browse-only mode by users of Analytica Free edition, Power Player or Analytica Cloud Platform.<br />
<br />
Analytica Free Edition is free to install, and hence provides way to share your models with others who do not have a licensed edition of Analytica. Power Player adds to this an ability to query databases, evaluate functions that require the Enterprise edition, and compute with huge indexes or sample sizes larger than 32000.<br />
<br />
==See Also==<br />
* [[Analytica User FAQs/Sharing Models]]<br />
* [[Free Edition]]<br />
* [https://www.lumina.com/products/free101/ Download Analytica Free Edition]<br />
* [[Analytica Cloud Platform (ACP)]]<br />
* [[Editions of Analytica]]<br />
<br />
<br />
<footer>Links or URL in model attributes / {{PAGENAME}} / Analytica Cloud Platform (ACP)</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Analytica_Free_Edition&diff=59703Analytica Free Edition2023-08-23T16:40:44Z<p>Cclermont: /* Analytica Free Edition */</p>
<hr />
<div>[[Category:Analytica User Guide]]<br />
[[Category: Free Edition]]<br />
<br />
<breadcrumbs>Analytica User Guide > User Interfaces for End Users > {{PAGENAME}}</breadcrumbs><br />
<br />
==Model sharing options==<br />
When you distribute your model to others, one option is to provide them with your model file, and ensure that they have Analytica installed on their computer. To use the model, they’ll need to install the [[Analytica Free Edition]], [[Analytica Power Player]], or a full Analytica edition on their Windows-based computer. A second option is to publish your model to the [[Analytica Cloud Platform]] (ACP) and send them a URL to your model. When you do this, they only need a Flash-enabled web browser, and can view your model even from non-Windows computers. When you build a model with the intention of sharing it over the web, additional stylistic considerations, discussed below and in the next section, can have a big impact on usability.<br />
<br />
== Analytica Free Edition ==<br />
The Analytica Free edition allows users to browse existing models, change inputs, and evaluate and view results. When the model has more than 101 user objects, or is saved as browse only, users cannot make changes to the model except for changes variables with input nodes.<br />
<br />
== Big Announcement ==<br />
Release 6.4 will support 1000 objects, OLE linking and multithreading!<br />
<br />
They also cannot utilize features that are not available with Analytica Professional such as database access, huge indexes, or Monte Carlo runs with more than 32000 iterations (see [[Analytica Enterprise]]).<br />
<br />
To distribute your model to someone who already has Analytica installed, either the Free edition or another edition, you can simply attach the model to an email. When the user clicks on the attachment and selects '''Run''', the model opens in Analytica. You can also place the model on a web server with a hyperlink on web page using HTML such as: <br />
<br />
:<code>Please view <a href="myModel.ana">my Analytica model</a></code>. <br />
:<code>If you do not have Analytica installed on your computer, please <nowiki><a href="https://www.lumina.com/products/free101/"></nowiki>download and install Analytica Free Edition</a>first.</code><br />
<br />
When the user who has Analytica installed clicks on the model link, Analytica launches with the model loaded.<br />
<br />
When your model is spread across multiple linked modules, you will need to send all these module files to your end-user and have them save them all (usually in the same directory) before launching the main file. Be sure to tell them which model file is the top-level model that they should launch. To avoid the multiple-file complication, a better option is to save a copy of your model in a single file and send or post that single file (the linked-file structure is not preserved when you do this, hence, you send it as a copy). To do this, select '''File→ Save A Copy In... '''and check the '''Save everything in one file by embedding linked modules '''checkbox.<br />
<br />
Spreadsheet functions such as [[SpreadsheetOpen]](), [[SpreadsheetCell]](), etc., and [[OLE Linking]] are not available in Analytica Cloud Platform (ACP).<br />
<br />
==Testing in Free Edition ==<br />
To experience your model in the Analytica Free edition yourself before handing it off to your users, select '''Help &rarr; Update License...''', and select '''analytica_free '''from the '''License ID''' dropdown. After pressing OK, you’ll need to restart Analytica. Repeat the process to select your other license when you are finished. If you do this often, you may wish to create a Windows desktop shortcut to eliminate the need for the above steps. The shortcut should run the following command line:<br />
<br />
:<code>Analytica.exe /lic:analytica_free</code><br />
<br />
The Analytica Power Player provides users with the ability to utilize Enterprise-edition features. Although a Power Player is not free, it is less expensive than the license for a full Professional edition. If your users require live access to your ODBC databases, huge arrays, or the ability to save their inputs, then Power Player should be used. Optimizer-enabled Power Player licenses are also available.<br />
<br />
<br />
== Summary ==<br />
You can use input and output nodes to direct users of your model to relevant input and output variables. These nodes can be arranged into control panels for convenient presentation.<br />
<br />
Only variables with an associated input node can be modified by in browse-only mode by users of Analytica Free edition, Power Player or Analytica Cloud Platform.<br />
<br />
Analytica Free Edition is free to install, and hence provides way to share your models with others who do not have a licensed edition of Analytica. Power Player adds to this an ability to query databases, evaluate functions that require the Enterprise edition, and compute with huge indexes or sample sizes larger than 32000.<br />
<br />
==See Also==<br />
* [[Analytica User FAQs/Sharing Models]]<br />
* [[Free Edition]]<br />
* [https://www.lumina.com/products/free101/ Download Analytica Free Edition]<br />
* [[Analytica Cloud Platform (ACP)]]<br />
* [[Editions of Analytica]]<br />
<br />
<br />
<footer>Links or URL in model attributes / {{PAGENAME}} / Analytica Cloud Platform (ACP)</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Analytica_Free_Edition&diff=59702Analytica Free Edition2023-08-23T16:36:35Z<p>Cclermont: /* Analytica Free Edition */</p>
<hr />
<div>[[Category:Analytica User Guide]]<br />
[[Category: Free Edition]]<br />
<br />
<breadcrumbs>Analytica User Guide > User Interfaces for End Users > {{PAGENAME}}</breadcrumbs><br />
<br />
==Model sharing options==<br />
When you distribute your model to others, one option is to provide them with your model file, and ensure that they have Analytica installed on their computer. To use the model, they’ll need to install the [[Analytica Free Edition]], [[Analytica Power Player]], or a full Analytica edition on their Windows-based computer. A second option is to publish your model to the [[Analytica Cloud Platform]] (ACP) and send them a URL to your model. When you do this, they only need a Flash-enabled web browser, and can view your model even from non-Windows computers. When you build a model with the intention of sharing it over the web, additional stylistic considerations, discussed below and in the next section, can have a big impact on usability.<br />
<br />
==Analytica Free Edition ==<br />
The Analytica Free edition allows users to browse existing models, change inputs, and evaluate and view results. When the model has more than 1000 user objects, or is saved as browse only, users cannot make changes to the model except for changes variables with input nodes.<br />
<br />
They also cannot utilize features that are not available with Analytica Professional such as database access, huge indexes, or Monte Carlo runs with more than 32000 iterations (see [[Analytica Enterprise]]).<br />
<br />
To distribute your model to someone who already has Analytica installed, either the Free edition or another edition, you can simply attach the model to an email. When the user clicks on the attachment and selects '''Run''', the model opens in Analytica. You can also place the model on a web server with a hyperlink on web page using HTML such as: <br />
<br />
:<code>Please view <a href="myModel.ana">my Analytica model</a></code>. <br />
:<code>If you do not have Analytica installed on your computer, please <nowiki><a href="https://www.lumina.com/products/free101/"></nowiki>download and install Analytica Free Edition</a>first.</code><br />
<br />
When the user who has Analytica installed clicks on the model link, Analytica launches with the model loaded.<br />
<br />
When your model is spread across multiple linked modules, you will need to send all these module files to your end-user and have them save them all (usually in the same directory) before launching the main file. Be sure to tell them which model file is the top-level model that they should launch. To avoid the multiple-file complication, a better option is to save a copy of your model in a single file and send or post that single file (the linked-file structure is not preserved when you do this, hence, you send it as a copy). To do this, select '''File→ Save A Copy In... '''and check the '''Save everything in one file by embedding linked modules '''checkbox.<br />
<br />
Spreadsheet functions such as [[SpreadsheetOpen]](), [[SpreadsheetCell]](), etc., and [[OLE Linking]] are not available in Analytica Cloud Platform (ACP).<br />
<br />
==Testing in Free Edition ==<br />
To experience your model in the Analytica Free edition yourself before handing it off to your users, select '''Help &rarr; Update License...''', and select '''analytica_free '''from the '''License ID''' dropdown. After pressing OK, you’ll need to restart Analytica. Repeat the process to select your other license when you are finished. If you do this often, you may wish to create a Windows desktop shortcut to eliminate the need for the above steps. The shortcut should run the following command line:<br />
<br />
:<code>Analytica.exe /lic:analytica_free</code><br />
<br />
The Analytica Power Player provides users with the ability to utilize Enterprise-edition features. Although a Power Player is not free, it is less expensive than the license for a full Professional edition. If your users require live access to your ODBC databases, huge arrays, or the ability to save their inputs, then Power Player should be used. Optimizer-enabled Power Player licenses are also available.<br />
<br />
<br />
== Summary ==<br />
You can use input and output nodes to direct users of your model to relevant input and output variables. These nodes can be arranged into control panels for convenient presentation.<br />
<br />
Only variables with an associated input node can be modified by in browse-only mode by users of Analytica Free edition, Power Player or Analytica Cloud Platform.<br />
<br />
Analytica Free Edition is free to install, and hence provides way to share your models with others who do not have a licensed edition of Analytica. Power Player adds to this an ability to query databases, evaluate functions that require the Enterprise edition, and compute with huge indexes or sample sizes larger than 32000.<br />
<br />
==See Also==<br />
* [[Analytica User FAQs/Sharing Models]]<br />
* [[Free Edition]]<br />
* [https://www.lumina.com/products/free101/ Download Analytica Free Edition]<br />
* [[Analytica Cloud Platform (ACP)]]<br />
* [[Editions of Analytica]]<br />
<br />
<br />
<footer>Links or URL in model attributes / {{PAGENAME}} / Analytica Cloud Platform (ACP)</footer></div>Cclermonthttps://docs.analytica.com/index.php?title=Analytica_Cloud_Platform&diff=59304Analytica Cloud Platform2023-05-31T19:19:44Z<p>Cclermont: </p>
<hr />
<div>[[Category: Analytica Cloud Platform]]<br />
The '''Analytica Cloud Platform''' (ACP) lets you run Analytica models via a web browser, and share your models with other people. This page explains the advantages of ACP, how to use ACP, the different ACP subscriptions, with links to subpages with more detail.<br />
<br />
==Why use ACP?==<br />
<br />
* ACP lets you share any Analytica model with others to view and run as a web application. <br />
* ACP users don’t need to install any software. They just need a web browser. <br />
* Running a model in ACP is similar to Analytica in [[browse mode]]. You can view model influence diagrams and objects, change inputs, and compute results as tables and graphs. But you can't edit model expressions or add variables. <br />
* When you deploy a model via ACP, you can be sure that all users have the latest version of a model and any data -- which is not so easy when you distribute a model and data for end users to run with desktop Analytica.<br />
*ACP offers several useful user-interface and navigation styles convenient for web applications, which are not available in Analytica on the desktop, including: <br />
**Tabs across the top or down the left side of the screen let users navigate to user-interface pages (Analytica modules.)<br />
** You can [[ACP Rendering tables and graphs on the diagram | embed tables and graphs]] in a diagram using Frames.<br />
** For more, see [[Differences between ACP and Desktop Analytica]]<br />
<br />
==How to use ACP==<br />
<br />
* Any Analytica user (even with [[Analytica Free 101|Analytica Free]]) can sign up for an ACP account at [https://acp.analytica.com/ acp.analytica.com]. Enter your email address and a password, then press Sign up. ACP will email you a link to verify your email address, and then you can sign in. Or you can use a Gmail or other Google sign in and if your password is saved in your browser you will signed in to a new individual account.. <br />
* In the ACP Models page, click the '''Upload''' button to upload an Analytica model to run in ACP.<br />
* Upload a model to ACP directly from inside Analytica. Just select '''Publish to Cloud''' from the [[File menu]].<br />
* The first time you Publish to Cloud, it prompts you to start an ACP account. <br />
* With your ACP account, you can [https://acp.analytica.com/ log in to ACP] from a web browser and select a model to run.<br />
* An ACP account includes a project folder on the server that lets you review, start, share, upload, and download your models.<br />
* You can email anyone a link to let them run your ACP model. Just click the '''Invite''' button at the bottom of the model. <br />
* With a Group Account, an Admin can add users as Reviewers, Authors (who can upload new models), or other Admins. You can also create new Projects, each with a directory of models and data. <br />
* ACP models can import and export data as CSV files.<br />
* ACP can open and save Excel spreadsheets using [[LibXL]]. (On [https://acp.analytica.com acp.analytica.com], for security and reliability reasons Excel is not installed, if you have an [[ACP_Server_License]] you can install and use Excel to work with spreadsheets). [[ACP3#Features_excluded_from_ACP3|Features _excluded_from_ACP3]].<br />
* [[ACP_Server_License|ACP servers]] can be configured to connect to databases.<br />
* For more, view the [https://youtu.be/OH3mYa_m0xE Analytica Cloud Platform (ACP) video]<br />
<br />
== Capabilities by ACP subscription type ==<br />
Every Analytica user can create an ACP account and upload models to run in it. Even with Analytica Free, you have 25 free sessions. If you have a current subscription or support, you get 25 sessions per month. You can always buy more sessions. With a Group Account, you can create projects with multiple users, 5 for a Basic Group Account, and 12 users for a Premium Group Account. These all run on servers hosted by Lumina. You can also buy an ACP Server license to run on a dedicated server that you can host yourself.<br />
:{| class="wikitable"<br />
!<br />
!Individual Account<br />
!Individual Account<br />
!Group Account<br />
!Group Account<br />
!<br />
|-<br />
!<br />
! Free<br />
or expired Support<br />
! Analytica Subscription or Support<br />
! Basic<br />
! Premium<br />
! ACP Server License<br />
|-<br />
| Publish Models<br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|-<br />
| Email Invites & Anonymous Views<br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|-<br />
| Named Users & Roles<br />
| <span style="color:#B22222">✗</span><br />
|<span style="color:#B22222">✗</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|-<br />
| Access Control<br />
| <span style="color:#B22222">✗</span><br />
| <span style="color:#B22222">✗</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|-<br />
| Save<br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|-<br />
| Shared Project Folders<br />
| <span style="color:#B22222">✗</span><br />
| <span style="color:#B22222">✗</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|-<br />
<!--| Customizable Logo<br />
| <span style="color:#B22222">✗</span><br />
| <span style="color:#B22222">✗</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|<span style="color:#32CD32">'''✓'''</span><br />
|---><br />
| Sessions<br />
| 25 total<br />
| 25/month<br />
| 500/month<br />
| 1200/month<br />
| No limit<br />
|-<br />
| Maximum Number of Users<br />
| 1<br />
| 1<br />
| 5<br />
| 12<br />
| 24 upwards<br />
|-<br />
| Additional Sessions<br />
| $100 for 100 sessions<br />
| $100 for 100 sessions<br />
| $100 for 100 sessions<br />
| $100 for 100 sessions<br />
| No limit<br />
|-<br />
| Maximum File Size<br />
| 25 MB<br />
| 25 MB<br />
| 50MB<br />
| 100MB<br />
| 200 MB<br />
|-<br />
| Max memory per session<br />
| 2 GB<br />
| 4 GB<br />
| 8 GB<br />
| 8 GB Ask for more<br />
| No limit<br />
|-<br />
| Optimizer<br />
|<span style="color:#B22222">✗</span> <br />
|<span style="color:#B22222">✗</span> <br />
|<span style="color:#B22222">✗</span><br />
|<span style="color:#32CD32">Add-on</span><br />
| <span style="color:#32CD32">Add-on</span><br />
|-<br />
| Price<br />
| Free<br />
| Included<br />
| $2,000/year<br />
| $5,000/year<br />
| Call (+1) 650-212-1212 or Sales@Lumina.com<br />
|}<br />
* A '''''session''''' is a model run,including a when someone runs a model from a link you emailed or posted on a web page.<br />
* Viewing model listings without running a model does not use a session.<br />
*The free 25 sessions with Analytica Free (or with expired support) never expire. <br />
* The 25 free sessions per month with a subscription expire after each month.<br />
*If you need '''extra sessions''' you can [https://lumina.com/purchase-analytica] at $100 per 100 sessions.<br />
*You can buy a Basic and Premium Group Plan at [https://lumina.com/purchase-analytica/ https://lumina.com/purchase-analytica/], or call (+1) 650-212-1212, or [mailto:sales@lumina.com sales@lumina.com].<br />
*See the table above for limits on file sizes and CPU Minutes per calculation. Note that a calculation that takes, say, 2 CPU minutes may take longer to run in elapsed time when many users are running models on the same server.<br />
<br />
===ACP Group Plans===<br />
''See also [[ACP Group Plans]].''<br />
<br />
*A '''Group Plan''' lets multiple users run and share models with a single account.<br />
*A group plan can have multiple '''Projects''', each containing a directory of models and data.<br />
*Each user has their own account and password and can access only Projects of which they are a member.<br />
*Each user may have a '''role''' in each Project, as a <br />
**'''Reviewer''', who can run models, upload and download data, and save snapshots (models with changed data)<br />
**'''Author''' who can also upload and delete models, and send email invites, or a <br />
**'''Manager''', who can also add or change roles of other users of a Project for which he is a manager (including other managers).<br />
*A '''Subscription Admin''' is a Plan level, not Project level setting , and is a user who can create or delete Projects.<br />
<br />
===ACP Server License===<br />
You may purchase an ACP license to install [[ACP Server License|on a dedicated server]]. This lets you have many more users and/or run computationally intensive models without having to share server resources with other customers. You can install it on a server behind your organization's firewall on a corporate intranet for extra security for confidential or proprietary models and data. See [[ACP Server License]]<br />
<br />
==Security==<br />
Analytica Cloud Platform is a secure way to share models:<br />
*ACP uses a https for data transfer<br />
*Data input is not saved unless the user explicitly saves the model or a copy.<br />
*You can also [[Obfuscated and Browse-Only Models|lock and encrypt]] models so that all or parts of a model are hidden even if someone accesses the file<br />
<br />
==See also==<br />
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"><br />
<br />
* [[Editions of Analytica]]<br />
* [[ACP Group Plans | ACP Group plan features]]<br />
* [[ACP Group plans for Managers and Admins]]<br />
* [[Differences between ACP and Desktop Analytica]]<br />
* [https://youtu.be/OH3mYa_m0xE Analytica Cloud Platform (ACP) Webinar]<br />
* [[Tutorial: Sharing a model with ACP]]<br />
* [[ACP Style Library]]<br />
* [[AcpStyles]]<br />
* [[ACP3]]<br />
* [[ACP miscellaneous | ACP: Features not mentioned elsewhere]]<br />
* [[ACP Rendering tables and graphs on the diagram]]<br />
* [[Tables in ACP]]<br />
*[[ACP Diagram Sizes]]<br />
<!--[[Embedding an ACP model in a Web Page]]--><br />
* [[Embed an ACP model in a Web Page]]<br />
<!--Replaced by save as functionality* [[Save Snapshots in ACP]]--><br />
<!--* [[Transferring Data Between ACP and Desktop Analytica]]--><br />
* [[ACP Server License]]<br />
* [[ACP Server License#Server Requirements|ACP Server Needs]]<br />
* [[To install ACP]]<br />
<!--* [[Spreadsheets in ACP|Spreadsheets and text files in ACP ]] (need to edit this)--><br />
* [[What's new in ACP?]]<br />
<!--* [[Special ACP features]]--><br />
*[[Analytica_Cloud_Platform_(ACP)|ACP page of the Analytica user guide]]<br />
* [[Customizing an ACP server]] <br />
<!--*[[Installing ACPT Extensions on Your Server]]--><br />
<!--*[[ACPT_Tableau_Extensions]]--><br />
</div><br />
* Example models:<br />
** [https://www.analyticacloud.com/view?invite=4152&code=2842037813108496096 Play the Rent vs. Buy model in ACP.] The Rent vs. Buy model is an example model used in the Analytica Tutorial. It compares the Net Present Value of renting vs. buying a house. Model navigation is fairly intuitive. You can switch diagrams by clicking on modules or selecting different modules in the outline tree located on the left side of the diagram. Move the mouse over a node to see its description. Clicking on a variable displays its result graph or table. Select the Object tab to view the node's attributes, notably its definition.<br />
** [https://www.analyticacloud.com/view?invite=4151&code=3133146408084211192 Play the Foxes and Hares model in ACP.] The Foxes and Hares model is a predator-prey example model also used in the Tutorial. When playing this model ACP adds beveled gradients and drop shadows to nodes on the influence diagram. The hover highlight is set to 'Glow'. Also, the default tabbed UI has been removed. You can see node descriptions and node ID's when you move the cursor over a node. It displays model results directly on the diagram.</div>Cclermonthttps://docs.analytica.com/index.php?title=ACP_Server_License&diff=57926ACP Server License2022-08-24T18:33:23Z<p>Cclermont: /* Server Requirements */</p>
<hr />
<div>[[Category: Analytica Cloud Platform]]<br />
[[Category: Analytica installation and licenses]]<br />
<!--<font color = "red">Under construction</font>--><br />
<br />
Any user of Analytica, even the [[Free Edition]], can share their models via the [[Analytica Cloud Platform]] (ACP) so that end users can view and run it via a web browser. ACP is hosted on a Lumina cloud server for individual and Group ACP subscriptions. An organization can also purchase a ACP license to install on a dedicated server computer, including cloud services such as Google Cloud Platform, AWS, or Microsoft Azure. The advantages of a dedicated server are:<br />
* You can get reliably higher performance using a dedicated server that your organization is not sharing with other users.<br />
* There is no limit on CPU time per session and the number of users--other than the capacity of your server computer.<br />
* Your own IT department may configure custom firewalls and security options to protect confidential and proprietary data and models.<br />
* You may purchase the [[Analytica Optimizer Guide|Optimizer]] add-on and [http://www.lumina.com/products/analytica-optimizer/more-powerful-solver-engines/] for challenging optimization problems.<br />
Please contact [mailto:sales@Lumina.com sales@Lumina.com] or call us at (+01)-650-212-1212 for more information and pricing for an ACP server license.<br />
<br />
Here is an overview of the ACP server requirements, architecture, security, installation process, and updates.<br />
<br />
__TOC__<br />
<br />
==Server Requirements==<br />
<br />
The Analytica Cloud Platform software requires at least:<br />
* 64 bit Windows Server 2003 or later, or Windows 7 or later. We recommend Windows Server 2016 or later or Windows 10 or later .<br />
* 16GB RAM and 2 or 4 cores. We recommend at least 32 GB and SSD hard drive.<br />
* If you want to use HTTPS, you need to have an SSL certificate installed. <br />
<br />
<br />
The amount of RAM, number of cores and disk requirements depends on the memory and computation requirements of your models, and how many users may use ACP simultaneously. To estimate the RAM, you can run it in Analytica on your desktop and open the [[Memory usage]] dialog to see how much memory it is using. If your application uses a maximum of 5GB and you want to support up to 10 simultaneous users, you might specify at least 64GB RAM. (5GB*10 = 50GB plus an extra 16GB for operating system and ACP overhead). <br />
<br />
You can also test on most cloud platforms inexpensively, spinning up a server. Start with a modest configuration, then add extra RAM, processors, or disk space when needed. You can even upgrade the server temporarily when you anticipate a surge in demand.<br />
<br />
==ACP Architecture==<br />
<br />
ACP runs on a Windows server running any recent edition of Windows Server Operating System.<br />
End users access and run ACP models via a standard internet browser, such as Google Chrome or Microsoft Edge, running on their own client computers. <br />
<br />
ACP Uses an Apache web server on the server front-end, with all browser interaction going only through Apache. Apache serves the static web content files (HTML, pre-built minified JS, CSS, App image files) directly. When the web-socket request arrives, the Apache proxy_tunnel_module proxies it as a websocket request to a back-end Analytica server process, which spawns a new Analytica process for this user session, and hands off the socket to the spawned process. Once launched, the user-session Analytica process communicates directly with the proxy_wstunnel_module, which relays this communication through a TLS websocket (wss) to the browser.<br />
<br />
:[[Image:Suan on apache architecture.png|600x800px]]<br />
<br />
The ACP server has these software components:<br />
* Apache web server<br />
* The Analytica server - an ACP enabled Analytica process. The Analytica server process has to be running at all times.<br />
* The Analytica session process. Spawned from the ACP server process when you open an ACP session on your browser.<br />
* Microsoft Sql server (the express version works fine for smaller databases).<br />
<br />
<!--<br />
<br />
* '''Spreadsheets:''' Optionally, your models may access Excel spreadsheet files to read and/or write. It uses the same spreadsheet access functions available in Analytica. To support this, you will need to install Libxl or Office with Microsoft Excel on the server. <br />
--><br />
==ACP Security==<br />
<br />
You can configure ACP to run using HTTP or HTTPS. HTTPS provides industry-standard security for transferring data encrypted information over the internet. It is the same protocol used for example for online banking. To use HTTPS, you will need to purchase and install the SSL certificate for your server. Free certificates are also available - you can Google '''"Free SSL certificates"''' for a list of providers.<br />
<br />
You can also encrypt your model files before uploading them to ACP, using standard features in Analytica Enterprise and Optimizer. Open your model in Analytica and from the '''File''' menu select '''Save a copy in...'''. This will display this dialog:<br />
<br />
:[[image:Locked and encrypt.png]]<br />
<br />
Check the '''Lock and encrypt the copy''' checkbox indicated above to save a model in encrypted form. Analytica and ADE can run encrypted models, but there is no way to decrypt the source file. So, make sure to retain an unencrypted version of any model before encrypting it.<br />
<br />
==Authentication==<br />
===Firebase===<br />
The standard authentication method is with [https://firebase.google.com/ firebase]. This authenticates users on the internet. Lumina can assist you with setting this up.<br />
===Apache Authentication===<br />
If the server is on an intranet and does not have access to the internet, you can use Apache authentication. We have installed ACP with the following authentication methods.<br />
<br />
*Apache [https://httpd.apache.org/docs/2.4/programs/htpasswd.html password file]<br />
*Windows SSPI authentication<br />
*On premises Microsoft active directory.<br />
<br />
==Installing ACP==<br />
You will need a computer server running Windows server.<br />
<br />
===ACP Files===<br />
The ACP files required are distributed as a "bundle" which is a compressed archive like a "zip" file. The bundle will be made for your particular server. When configuring ACP and Apache, you will extract the zip files into the folder applicable folders.<br />
<br />
===Installation steps===<br />
ACP is usually installed on a server via remote desktop connection by a Lumina technical support person. For more specific information or to install yourself, you can follow the steps here [[To_install_ACP]]:<br />
<br />
#Install Apache - you will also need to install the Visual C++ 2015-2022 redistributables first.<br />
#Install a browser. Google Chrome or Microsoft Edge.<br />
#Install PHP (if you intend to use Apache authentication)<br />
#In the firewall open ports 80 and 443<br />
#Install SqlExpress - including the management studio<br />
#Create a login and sql user for ACP to use when accessing the database.<br />
#Add your SSL certificate to the Apache /conf directory.<br />
#Install Analytica .<br />
#Install the ACP code (this includes the server enabled version of Analytica, some other dll's and configuration files and the javascript files). See [[ACP_Server_License#ACP Files]].<br />
#Create the ACP subscription database - using an Analytica model file downloaded in the previous step.<br />
#Create the tables within the database schema - uses another Analytica model.<br />
#Get the Apache configuration files from Lumina and insert them into the Apache\conf and the Apache\conf\extra directories. See [[ACP_Server_License#ACP Files]]<br />
#Create a non-admin windows account for Analytica server and sessions processes to run under.<br />
#Give this windows account permission in the local security policy to log on as a batch job.<br />
#Create scheduled tasks in the task manager for the Analytica server process(es) to run at computer startup.<br />
#Create an ACP Group account.<br />
<br />
==Updating ACP for a New Release==<br />
<br />
Lumina periodically issues new releases for ACP with new features and bug fixes. For as long as you have active maintenance and support (included free for 12 months when you purchase an ACP license or subscription), Lumina will provide you free updates. We will provide instructions on how to perform each upgrade. Generally, the update consists of files to be copied into the ACP directory.<br />
<br />
==See Also==<br />
* [[Analytica Cloud Platform]]</div>Cclermonthttps://docs.analytica.com/index.php?title=ACP_Server_License&diff=57925ACP Server License2022-08-24T18:32:47Z<p>Cclermont: /* Server Requirements */</p>
<hr />
<div>[[Category: Analytica Cloud Platform]]<br />
[[Category: Analytica installation and licenses]]<br />
<!--<font color = "red">Under construction</font>--><br />
<br />
Any user of Analytica, even the [[Free Edition]], can share their models via the [[Analytica Cloud Platform]] (ACP) so that end users can view and run it via a web browser. ACP is hosted on a Lumina cloud server for individual and Group ACP subscriptions. An organization can also purchase a ACP license to install on a dedicated server computer, including cloud services such as Google Cloud Platform, AWS, or Microsoft Azure. The advantages of a dedicated server are:<br />
* You can get reliably higher performance using a dedicated server that your organization is not sharing with other users.<br />
* There is no limit on CPU time per session and the number of users--other than the capacity of your server computer.<br />
* Your own IT department may configure custom firewalls and security options to protect confidential and proprietary data and models.<br />
* You may purchase the [[Analytica Optimizer Guide|Optimizer]] add-on and [http://www.lumina.com/products/analytica-optimizer/more-powerful-solver-engines/] for challenging optimization problems.<br />
Please contact [mailto:sales@Lumina.com sales@Lumina.com] or call us at (+01)-650-212-1212 for more information and pricing for an ACP server license.<br />
<br />
Here is an overview of the ACP server requirements, architecture, security, installation process, and updates.<br />
<br />
__TOC__<br />
<br />
==Server Requirements==<br />
<br />
The Analytica Cloud Platform software requires at least:<br />
* 64 bit Windows Server 2003 or later, or Windows 7 or later. We recommend Windows Server 2016 or later or Windows 10 or later .<br />
* 16GB RAM and 2 or 4 cores. We recommend at least 32 GB and SSD hard drive.<br />
* If you want to use HTTPS, you need to have an SSL certificate installed. <br />
<br />
The amount of RAM, number of cores and disk requirements depends on the memory and computation requirements of your models, and how many users may use ACP simultaneously. To estimate the RAM, you can run it in Analytica on your desktop and open the [[Memory usage]] dialog to see how much memory it is using. If your application uses a maximum of 5GB and you want to support up to 10 simultaneous users, you might specify at least 64GB RAM. (5GB*10 = 50GB plus an extra 16GB for operating system and ACP overhead). <br />
<br />
You can also test on most cloud platforms inexpensively, spinning up a server. Start with a modest configuration, then add extra RAM, processors, or disk space when needed. You can even upgrade the server temporarily when you anticipate a surge in demand.<br />
<br />
==ACP Architecture==<br />
<br />
ACP runs on a Windows server running any recent edition of Windows Server Operating System.<br />
End users access and run ACP models via a standard internet browser, such as Google Chrome or Microsoft Edge, running on their own client computers. <br />
<br />
ACP Uses an Apache web server on the server front-end, with all browser interaction going only through Apache. Apache serves the static web content files (HTML, pre-built minified JS, CSS, App image files) directly. When the web-socket request arrives, the Apache proxy_tunnel_module proxies it as a websocket request to a back-end Analytica server process, which spawns a new Analytica process for this user session, and hands off the socket to the spawned process. Once launched, the user-session Analytica process communicates directly with the proxy_wstunnel_module, which relays this communication through a TLS websocket (wss) to the browser.<br />
<br />
:[[Image:Suan on apache architecture.png|600x800px]]<br />
<br />
The ACP server has these software components:<br />
* Apache web server<br />
* The Analytica server - an ACP enabled Analytica process. The Analytica server process has to be running at all times.<br />
* The Analytica session process. Spawned from the ACP server process when you open an ACP session on your browser.<br />
* Microsoft Sql server (the express version works fine for smaller databases).<br />
<br />
<!--<br />
<br />
* '''Spreadsheets:''' Optionally, your models may access Excel spreadsheet files to read and/or write. It uses the same spreadsheet access functions available in Analytica. To support this, you will need to install Libxl or Office with Microsoft Excel on the server. <br />
--><br />
==ACP Security==<br />
<br />
You can configure ACP to run using HTTP or HTTPS. HTTPS provides industry-standard security for transferring data encrypted information over the internet. It is the same protocol used for example for online banking. To use HTTPS, you will need to purchase and install the SSL certificate for your server. Free certificates are also available - you can Google '''"Free SSL certificates"''' for a list of providers.<br />
<br />
You can also encrypt your model files before uploading them to ACP, using standard features in Analytica Enterprise and Optimizer. Open your model in Analytica and from the '''File''' menu select '''Save a copy in...'''. This will display this dialog:<br />
<br />
:[[image:Locked and encrypt.png]]<br />
<br />
Check the '''Lock and encrypt the copy''' checkbox indicated above to save a model in encrypted form. Analytica and ADE can run encrypted models, but there is no way to decrypt the source file. So, make sure to retain an unencrypted version of any model before encrypting it.<br />
<br />
==Authentication==<br />
===Firebase===<br />
The standard authentication method is with [https://firebase.google.com/ firebase]. This authenticates users on the internet. Lumina can assist you with setting this up.<br />
===Apache Authentication===<br />
If the server is on an intranet and does not have access to the internet, you can use Apache authentication. We have installed ACP with the following authentication methods.<br />
<br />
*Apache [https://httpd.apache.org/docs/2.4/programs/htpasswd.html password file]<br />
*Windows SSPI authentication<br />
*On premises Microsoft active directory.<br />
<br />
==Installing ACP==<br />
You will need a computer server running Windows server.<br />
<br />
===ACP Files===<br />
The ACP files required are distributed as a "bundle" which is a compressed archive like a "zip" file. The bundle will be made for your particular server. When configuring ACP and Apache, you will extract the zip files into the folder applicable folders.<br />
<br />
===Installation steps===<br />
ACP is usually installed on a server via remote desktop connection by a Lumina technical support person. For more specific information or to install yourself, you can follow the steps here [[To_install_ACP]]:<br />
<br />
#Install Apache - you will also need to install the Visual C++ 2015-2022 redistributables first.<br />
#Install a browser. Google Chrome or Microsoft Edge.<br />
#Install PHP (if you intend to use Apache authentication)<br />
#In the firewall open ports 80 and 443<br />
#Install SqlExpress - including the management studio<br />
#Create a login and sql user for ACP to use when accessing the database.<br />
#Add your SSL certificate to the Apache /conf directory.<br />
#Install Analytica .<br />
#Install the ACP code (this includes the server enabled version of Analytica, some other dll's and configuration files and the javascript files). See [[ACP_Server_License#ACP Files]].<br />
#Create the ACP subscription database - using an Analytica model file downloaded in the previous step.<br />
#Create the tables within the database schema - uses another Analytica model.<br />
#Get the Apache configuration files from Lumina and insert them into the Apache\conf and the Apache\conf\extra directories. See [[ACP_Server_License#ACP Files]]<br />
#Create a non-admin windows account for Analytica server and sessions processes to run under.<br />
#Give this windows account permission in the local security policy to log on as a batch job.<br />
#Create scheduled tasks in the task manager for the Analytica server process(es) to run at computer startup.<br />
#Create an ACP Group account.<br />
<br />
==Updating ACP for a New Release==<br />
<br />
Lumina periodically issues new releases for ACP with new features and bug fixes. For as long as you have active maintenance and support (included free for 12 months when you purchase an ACP license or subscription), Lumina will provide you free updates. We will provide instructions on how to perform each upgrade. Generally, the update consists of files to be copied into the ACP directory.<br />
<br />
==See Also==<br />
* [[Analytica Cloud Platform]]</div>Cclermont