View source for Defining a variable that is influenced by other variable

[[Category: Definitions]]
[[Category: Variables]]

:'''a.''' Bring up the object window. There are two ways to do this
*First, Select fuel cost node. Click '''Object''' button from the tool palette. '''The object window should appear.'''  Close the object window.
*Now try Double clicking on the ‘Fuel cost’ node. [[Object window]] should appear.
:[[Image:Fuel object.jpg]]
:'''b.''' Click on the ‘units’ field. Type ‘$/year’. Press tab key. In the ‘Description’ field, type ‘Annual cost of fuel’. Press Tab key. 
:[[Image:Object fuel cost.jpg]]

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Enter the mathematical expression in the ‘Definition’ fieldClick on the ‘Definition’ field. A cross and check box, together with ‘inputs’ button should appear. Click ‘inputs’ button. Select ‘Fuel price’. Type ‘*’. Select ‘miles per year’. Type ‘/’. Select ‘Miles per gallon’. The definition field now should be ‘Fuel_Price*Mpy/Mpg’

:[[Image:Definition fuel cost1.1.jpg]]

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:[[Image:Definition fuel cost1.2.jpg]]
:'''c.''' Click the '''Diagram''' button.  You should return to influence diagram

==See Also==
* [[About influence diagrams]]