Difference between revisions of "WhatIf"
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| − | [[category:Evaluation Functions]] | + | [[category:Evaluation Functions] |
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| + | ==Whatif(e, v, x)== | ||
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| + | Returns the value of expression e, after assigning value x to variable v. Whatif helps you explore the effects of a change to a variable, without making it permanent. After evaluation, it returns v back to its original definition, and so makes no permanent change to the model. | ||
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| + | ;[[Parameters]]: Whatif(e: Expression; v: Variable; x) | ||
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| + | ==WhatifAll(e, varlist, x)== | ||
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| + | Returns an array of values indexed by varlist, a list of variables, obtained by evaluating expression e, after assigning to each variable in varlist the corresponding value from x. Usually, x is an array indexed by varlist. Use WhatifAll for generating tornado diagrams and other sensitivity analyses when you want to see the effect on e of | ||
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| + | after assigning value x to variable v. Whatif helps you explore the effects of a change to a variable, without making it permanent. After evaluation, it returns v back to its original definition, and so makes no permanent change to the model. | ||
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| + | ;[[Parameters]]: Whatif(e: Expression; v: Variable; x) | ||
Revision as of 21:32, 15 February 2007
[[category:Evaluation Functions]
Whatif(e, v, x)
Returns the value of expression e, after assigning value x to variable v. Whatif helps you explore the effects of a change to a variable, without making it permanent. After evaluation, it returns v back to its original definition, and so makes no permanent change to the model.
- Parameters
- Whatif(e: Expression; v: Variable; x)
WhatifAll(e, varlist, x)
Returns an array of values indexed by varlist, a list of variables, obtained by evaluating expression e, after assigning to each variable in varlist the corresponding value from x. Usually, x is an array indexed by varlist. Use WhatifAll for generating tornado diagrams and other sensitivity analyses when you want to see the effect on e of
after assigning value x to variable v. Whatif helps you explore the effects of a change to a variable, without making it permanent. After evaluation, it returns v back to its original definition, and so makes no permanent change to the model.
- Parameters
- Whatif(e: Expression; v: Variable; x)
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