Originally posted by: lokoloko

Hi,

How can I write in java using library cplex.jar matrix u[7][2][2] with bounds 0<=u=<1?
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

Just create a standard 3D array of IloNumVar and fill each slot in that array individually. Or use the IloCplex.numVarArray() functions that returns a one-dimensional array to keep your code a little shorter:

IloCplex cplex = new IloCplex();
final int dim1 = 7;
final int dim2 = 2;
final int dim3 = 2;
final double lb = 0;
final double ub = 1;
 
IloNumVar[][][] array3d = new IloNumVar[dim1][][];
for (int i = 0; i < array3d.length; ++i) {
   array3d[i] = new IloNumVar[dim2][];
   for (int j = 0; j < array3d[i].length; ++j)
      array3d[i][j] = cplex.numVarArray(dim3, lb, ub);
}

#CPLEXOptimizers
#DecisionOptimization

Originally posted by: lokoloko

OK. Another qustion. I have got constraint like that:

sum after d

u[d][i][j]<=1. If cplex.jar has function to do that or rather do that in 3 loops:

for(int d=0;d<....)
{
    for(int i=0;...)
    {
       for(int j=0;...)
       {
          u[d]+=u[d][i][j]
       }
    }
}

#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

Maybe have a look at the reference manual here?
The CPLEX Java API does not provide a function to sum over a three dimensional array. So you will have to use the loops you indicated.
#CPLEXOptimizers
#DecisionOptimization