Originally posted by: ZakariaChekoubi

I need to access the values of the four-dimensional decion variable after solving my model. Here is the declaration of my decion variable in Java: 

this.y = new IloIntVar[this.Ncd][][][]; 
        for(int i=0; i<this.y.length;i++) { 
            this.y[i]= new IloIntVar[this.Ncd][][]; 
            for(int j=0; j<this.y[i].length;j++) {
                this.y[i][j]= new IloIntVar[this.Nbv+1][];
                for(int k=1; k<this.y[i][j].length; k++) {
                    this.y[i][j][k]= new IloIntVar[this.T+1];

                        this.y[i][j][k]= this.cplex.boolVarArray(this.T+1);

            }
        }
    }

I really need you  help to use the simulation results of my model.

Best regards,

Zakaria

Hi,

I would recommend the example facility.java in CPLEX_Studio128\cplex\examples\src\java

And there you will see

// Create variables. We have variables
         // open[j]        if location j is open.
         // supply[i][j]]  how much client i is supplied from location j
         IloNumVar[] open = cplex.boolVarArray(nbLocations);       
         IloNumVar[][] supply = new IloNumVar[nbClients][];
         for (int i = 0; i < nbClients; i++)
            supply[i] = cplex.numVarArray(nbLocations, 0.0, 1.0);

regards

https://www.linkedin.com/pulse/low-barrier-entry-optimization-through-cplex-alex-fleischer/

Originally posted by: ZakariaChekoubi

@AlexFleischer 

if I understand correctly, I have a problem with the declaration of the decision variable?

cplex.getValue(y[i][j][k][l])

will give you the value for the respective variable.

Originally posted by: ZakariaChekoubi

@DanielJunglas Thank you for your answer. I tried your proposal to use the cplex.getValue(y [i] [j] [k] [l]) method, but the problem still persists:

for (int i = 0; i < this.Ncd; i++) {

                for (int j = 0; j < this.Ncd; j++) {
                   for (int k = 1; k < this.Nbv; k++) {
                           for(int t=1; t<this.T; t++)
                      System.out.printf("valeur = "+this.cplex.getValue(this.y[i][j][k][t]));
                      }
                   }
                }

System.out.printf("valeur = "+this.cplex.getValue(this.y[i][j][k][t]));

Hard to tell what is wrong because you omitted the actual error message. Can you please show the full exception message?

Originally posted by: ZakariaChekoubi

What do you think about it ?

Hi,

IloCplex mycplex = new IloCplex();

int Ncd=2;
int Nbv=6;
int T=4;

IloNumVar[][][][] y = new IloIntVar[Ncd][][][];
        for(int i=0; i<y.length;i++) {
            y[i]= new IloIntVar[Ncd][][];
            for(int j=0; j<y[i].length;j++) {
                y[i][j]= new IloIntVar[Nbv+1][];
                for(int k=1; k<y[i][j].length; k++) {
                    y[i][j][k]= new IloIntVar[T+1];

                        y[i][j][k]= mycplex.boolVarArray(T+1);
for(int t=1; t<T; t++)
{
                        IloRange myConstraint2 = mycplex.addEq(y[i][j][k][t],1);
mycplex.add(myConstraint2);
}

            }
        }
    }

mycplex.solve();

for (int i = 0; i < Ncd; i++) {

                for (int j = 0; j < Ncd; j++) {
                   for (int k = 1; k < Nbv; k++) {
                           for(int t=1; t<T; t++)
                      System.out.printf("valeur = "+mycplex.getValue(y[i][j][k][t]));
                      }
                   }
                }

works fine

regards

https://www.linkedin.com/pulse/loptimisation-faire-plus-avec-moins-un-zoo-des-bus-et-alex-fleischer-1/

Originally posted by: ZakariaChekoubi

@AlexFleischer a1d4492b-6cf8-402d-ae3c-dd656c427dc7 Goode morning. Thank you for your interest in my question. I am confused about the declaration of the decision variable. You declare it as follows:

IloNumVar[][][][] y = new IloIntVar[Ncd][][][];
        for(int i=0; i<y.length;i++) {
            y[i]= new IloIntVar[Ncd][][];
            for(int j=0; j<y[i].length;j++) {
                y[i][j]= new IloIntVar[Nbv+1][];
                for(int k=1; k<y[i][j].length; k++) {
                   

y[i][j][k]= new IloIntVar[T+1];

                        y[i][j][k]= mycplex.boolVarArray(T+1);
                }
            }
        }

I do not have to consider the line code 9. Right? 

indeed you may remove that line.

I think this was from your initial post

regards

Originally posted by: ZakariaChekoubi

Thank you. I think I have a problem with my constraints because i guess variables declarations are now ok. Now I think I have to check my constraints. Please, can I show you my constraints to give me your remarks?