consider negative value in cplex

Question

Hi I am using java with cplex

I am trying to maximize an equation and i want to consider the object even if it is a negative value.

I declared about my object variable like that

IloNumVar profit = cplex.numVar(0, Double.MAX_VALUE, "profit");

when i use this code the object value will be zero because it is negative

Do you have any suggestion to do that ?

Answer 1

2

You should not put a lower bound of zero on your variable if you want it to take negative values as well. I don't know the java-API but I could imagine it should look something like

IloNumVar profit = cplex.numVar(-IloInfinity, IloInfinity, "profit");

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answered 27 Oct '14, 08:51

Sune
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accept rate: 20%

edited 27 Oct '14, 08:52

Thank you very much

(27 Oct '14, 09:00) ibrahem

2

In the Java API, the way to represent infinity (signed) is Double.NEGATIVE_INFINITY or Double.POSITIVE_INFINITY.

(28 Oct '14, 16:24) Paul Rubin ♦♦

consider negative value in cplex

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