How can I write Cplex model.prod() function in Gurobi Java?

Answered

Fulya Terzi

June 19, 2020 11:12

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public GRBQuadExpr funcName(SegmentName segment, GRBModel model, GRBVar decVar)
throws GRBException { // IloNumExpr IloCplex IloNumVar IloException

// Gurobi does not except this one. How will I change this function
return model.prod(0.5 * segment.getPriceDifference() * segment.getQuantityDifference(), decVar, decVar);
}

 

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  June 23, 2025 03:11 Edited

  This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
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  Matthias Miltenberger

  • Gurobi Staff

  June 19, 2020 13:06 Edited

  Hi Fulya,

  It's not clear to me what problem you are facing. Could you please explain in some more detail what you want to do?

  Please also consult our documentation on adding quadratic constraints in Java.

  Thanks,
  Matthias

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  Fulya Terzi

  June 19, 2020 14:09

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  Hi Matthias,

  Actually, this is not a quadratic constraint. It is a method to construct an QuadExpr then another place we call this function to form objective function. My problem is that how can I write a QuadExpr as a method since the same QuadExpr will be used in several classes. Hence, I need some thing like in Cplex. In Cplex, we define IloCplex model and prod() built-in function belonging to the model. In Gurobi, I define GRBModel model but I need some built-in function or something else. 

   

  Thank you in advance

  Fulya

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  Fulya Terzi

  June 22, 2020 08:05

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  Okey I solved this problem thank you.

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