model.getValues()

Answered

Fulya Terzi

July 27, 2020 13:47

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Hi,

I need to get the values of decision variables. 

for (Entry<String, Line> lineEntry : optimizationParams.getNetworkElements().getLines().entrySet()) {
       if (LakeId.equals(lineEntry.getValue().getFromLake()) || LakeId.equals(lineEntry.getValue().getToLake())) {
       double[ ]  f = model.getValues(decisionVariables.getFlowVariables().get(lineEntry.getKey()));

}

}

I think there is nothing in Gurobi to get values as in Cplex. I tried  

GRBVar[ ] v = model.getVars(decisionVariables.getFlowVariables().get(lineEntry.getKey()));
double[ ] f = v.X;

but it is NOT Accepted.

The error message is "The method getVars() in the type GRBModel is not applicable for the arguments (GRBVar[])"

I need your advice.

Thank you in advance

 

0

• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  June 23, 2025 03:09 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?.
• 

  Eli Towle

  • Gurobi Staff

  July 28, 2020 22:10

  You can use the GRBModel.get() method to retrieve the X variable attributes for an array of GRBVar objects. E.g.:

  double[] vals = model.get(GRB.DoubleAttr.X, model.getVars()); 

  0

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