Originally posted by: JamieKang

Hello,

I have a MIP with about 200 variables, and I defined my variables x[i][j][k] (using Java). And I have a problem so I need to track down all the equations for errors.
However, using model.export(), I get IloX notations, and it's hard to track them. I tried to match the variables, but it looks like the numbering order changes as I change my objective function.
Is there any way to convert IloX variables to Xijk? Or is there any rules on how IloX numbers variables?

Thanks for any tips in advance,

Jamie
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

CPLEX provides variables with IloXxxx type names when one has not been explicitly provided during the model creation.

You can provide variable names using the following overloaded function for the IloCplex object during variable creation:
public IloNumVar[] numVarArray(IloColumnArray cols,
double[] lb,
double[] ub,
java.lang.String[] name)

Alternatively, you could also set the variable names at a later stage by using the setName method for an IloNumVar object. This could look like the following:
for(int i=0;i<i_range;i++)
for(int j=0;j<j_range;j++)
for(int k=0;k<k_range;k++)
x[i][j][k].setName("x("i")("j")("k")");

Hope this helps.
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: JamieKang

It worked out great! Thanks a lot!

Jamie
#CPLEXOptimizers
#DecisionOptimization