# Difference between revisions of "OptInfo"

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<br> ''New to [[Analytica 4.3]]. Supercedes the earlier [[SolverInfo]] function.'' | <br> ''New to [[Analytica 4.3]]. Supercedes the earlier [[SolverInfo]] function.'' | ||

− | = OptInfo( | + | = OptInfo(opt, item'', decision, constraint, asRef'') = |

− | Provides access to an «item» in the definition of an optimization problem definition ( | + | Provides access to an «item» in the definition of an optimization problem definition («opt») created by [[DefineOptimization]]. |

Possible values for the «item» are: | Possible values for the «item» are: | ||

Line 113: | Line 113: | ||

<br>If you include as a «decision» the identifier of a decision variable passed into the «decisions» parameter of [[DefineOptimization]], it gives results just for that decision. The result is dimensioned by the decision variable's indexes rather than by the '''.Vars''' index. The «decision» parameter is relevant to any of the «item»s in the above table that show '''.Vars''' in the dimensionality column. | <br>If you include as a «decision» the identifier of a decision variable passed into the «decisions» parameter of [[DefineOptimization]], it gives results just for that decision. The result is dimensioned by the decision variable's indexes rather than by the '''.Vars''' index. The «decision» parameter is relevant to any of the «item»s in the above table that show '''.Vars''' in the dimensionality column. | ||

− | «constraint» is the identifier of a constraint node passed into the «constraints» parameter of [[DefineOptimization]]. When this is provided, only the portion of the requested item relevant to that constraint is returned, and the result is dimensioned by the constraint's [[OptDimensions]] rather than by the '''.Constraints''' index. The «constraint» parameter is relevant to any of the «item»s in the above table that show '''.Constraints''' in the dimensionality column. | + | «constraint» is the identifier of a constraint node passed into the «constraints» parameter of [[DefineOptimization]]. When this is provided, only the portion of the requested item relevant to that constraint is returned, and the result is dimensioned by the constraint's [[OptDimensions]] rather than by the '''.Constraints''' index. The «constraint» parameter is relevant to any of the «item»s in the above table that show '''.Constraints''' in the dimensionality column. |

= See Also = | = See Also = |

## Revision as of 23:50, 10 February 2011

*New to Analytica 4.3. Supercedes the earlier SolverInfo function.*

# OptInfo(opt, item*, decision, constraint, asRef*)

Provides access to an «item» in the definition of an optimization problem definition («opt») created by DefineOptimization.

Possible values for the «item» are:

"Item" | Used for | Indexed by | Type | Description |
---|---|---|---|---|

"objcoef" | LP, QP | Vars | numeric | |

"Q" | QP | Vars, Vars2 | numeric | |

"lhs" | LP, QP | Vars, Constraints | numeric | |

"lhsQ", | QP | Vars, Vars2, Constraints | numeric | |

"rhs" | LP,QP,NLP | Constraints | numeric | |

"constraintUb" | LP,QP,NLP | Constraints | numeric | Upper bound for each constraint |

"constraintLb" | LP,QP,NLP | Constraints | numeric | Lower bound for each constraint |

"sense" | LP,QP,NLP | Constraints | '>=','<=', '=', 'R' | inequality for each constraint. 'R' for range (lb & ub) |

"lb" | LP,QP,NLP | Vars | numeric | lower bound for each variable |

"ub" | LP,QP,NLP | Vars | numeric | upper bound for each variable |

"ctype" | LP,QP,NLP | Vars | 'C', 'I', or 'B' | |

"group" | LP,QP,NLP | Vars | numeric | |

"maximize" | LP,QP,NLP | atomic | True, False | |

"engine" | LP,QP,NLP | atomic | text | |

"setting" | LP,QP,NLP | local .Parameter | numeric | |

"type" | LP,QP,NLP | atomic | "LP","QP", "QCP" or "NLP" | |

"vars" | LP,QP,NLP | Vars | elements of the Vars index | |

"constraints" | LP,QP,NLP | Constraints | the constraint names |

If you include as a «decision» the identifier of a decision variable passed into the «decisions» parameter of DefineOptimization, it gives results just for that decision. The result is dimensioned by the decision variable's indexes rather than by the **.Vars** index. The «decision» parameter is relevant to any of the «item»s in the above table that show **.Vars** in the dimensionality column.

«constraint» is the identifier of a constraint node passed into the «constraints» parameter of DefineOptimization. When this is provided, only the portion of the requested item relevant to that constraint is returned, and the result is dimensioned by the constraint's OptDimensions rather than by the **.Constraints** index. The «constraint» parameter is relevant to any of the «item»s in the above table that show **.Constraints** in the dimensionality column.

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