Difference: VariablesInAMPL (4 vs. 5)

Revision 52008-03-02 - MichaelOSullivan

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META TOPICPARENT	name="AMPLSyntax"

<-- Ready to Review -->

Variables in AMPL

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Often, you will want to create one variable for every member (respectively pair, tuple) from a set (a two-dimensional set, multi-dimensional set, respectively). To do this you simply add the set after the variable name:

Added:

>
>

var <varname> [{<indexname>}];

Example

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# Constraints: Meet the nutritional requirements

subject to MeetRequirement {r in REQUIREMENTS}:

Changed:

<
<

Min[r] <= sum {i in INGREDIENTS} Contributes[i, r] * Amount[i]
<= Max[r];

>
>

Min[r] <= sum {i in INGREDIENTS} Contributes[i, r] * Amount[i] <= Max[r];

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