Difference between revisions of "Dynamic using arrays"
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The initial value of a dynamic variable — that is, the first parameter to the '''[[Dynamic]]()''' function — can be a number, variable identifier, or other expression that evaluates to a single number, list, or array. Analytica evaluates a dynamic variable starting from each initial value, in each time period, so the result is a correctly dimensioned array.
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The initial value of a dynamic variable — that is, the first parameter to the [[Dynamic]]() function — can be a number, variable identifier, or other expression that evaluates to a single number, list, or array. Analytica evaluates a dynamic variable starting from each initial value, in each time period, so the result is a correctly dimensioned array.
  
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'''Example:''' Expanding the example (see “[[Dynamic function]]”), suppose the inflation rate of gasoline is uncertain. Instead of providing a single numerical value, you could define the inflation rate as a list.
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'''Example:''' Expanding the example (see [[Dynamic function]]), suppose the inflation rate of gasoline is uncertain. Instead of providing a single numerical value, you could define the inflation rate as a list.
  
 
[[File:Chapter17_11.png]]
 
[[File:Chapter17_11.png]]
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Using the new <code>Inflation</code> variable in the definition for <code>Gasprice</code>, the results show three different rates of increases in gasoline prices from 1990 to 1994:
 
Using the new <code>Inflation</code> variable in the definition for <code>Gasprice</code>, the results show three different rates of increases in gasoline prices from 1990 to 1994:
  
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Gasprice:
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:<code>Variable Gasprice :=</code>
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Dynamic(1.2, Gasprice[Time - 1]*(1 + Inflation)) &rarr;
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:<code>Dynamic(1.2, Gasprice[Time - 1]*(1 + Inflation)) &rarr;</code>
  
 
[[File:Chapter17_12.png]]
 
[[File:Chapter17_12.png]]

Revision as of 21:24, 4 January 2016

Analytica User GuideDynamic SimulationDynamic using arrays


The initial value of a dynamic variable — that is, the first parameter to the Dynamic() function — can be a number, variable identifier, or other expression that evaluates to a single number, list, or array. Analytica evaluates a dynamic variable starting from each initial value, in each time period, so the result is a correctly dimensioned array.

Example: Expanding the example (see Dynamic function), suppose the inflation rate of gasoline is uncertain. Instead of providing a single numerical value, you could define the inflation rate as a list.

Chapter17 11.png

Using the new Inflation variable in the definition for Gasprice, the results show three different rates of increases in gasoline prices from 1990 to 1994:

Variable Gasprice :=
Dynamic(1.2, Gasprice[Time - 1]*(1 + Inflation)) →

Chapter17 12.png

See Also


Dynamic initial valuesDynamic using arraysDynamic dependencies
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