Set the Priority of Variables

Answered

Masoud Kavoosi

• March 30, 2022 18:00

Hi there,

In CPLEX we have the capability to set the priority order for the variable var to pri in the format below:

public void setPriority(IloNumVar var, IloNum pri)

Does Gurobi have this option as well? I looked for it in several resources but could not find anything relevant.

Thanks,

Masoud

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• 

  Maliheh Aramon

  Gurobi Staff

  • March 31, 2022 03:01

  Hi Masoud, 

  Yes, you can use the integer-valued BranchPriority variable attribute to set a branching priority for each variable. For example, in Gurobi C++ API, you can use the GRBVar::set(GRB_IntAttr_BranchPriority, int) method.

  A priority ordering file (ORD format) can also be read in by Gurobi to input a set of variable priority orders.

  Best regards,

  Maliheh

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