Decision Optimization

Decision Optimization

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  • 1.  Update values of data 2 dimensional arrays in opl main script

    Posted Sat December 07, 2013 07:00 AM

    Originally posted by: 6A0Q_Hartioun_Arzoumanian


    I do the following:

    var src = new IloOplModelSource("project.mod");    
    var def = new IloOplModelDefinition(src);     
    var cplex = new IloCplex();      
    var model = new IloOplModel(def, cplex);     
    var data = new IloOplDataSource("project.dat");
    var data2 = new IloOplDataElements();

    data2.VMMapping[2][4] = 1; // here I get an error

    it says VMMapping doesnot exist.

    where VMMapping is a two dimensional array declared in project.mod file as follows:

    int VMMapping[v in V][d in D] = ...; 


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 2.  Re: Update values of data 2 dimensional arrays in opl main script

    Posted Sat December 07, 2013 03:13 PM

    Hi,

     

    let me give you an example:

    You have sub.mod

    float maxOfx = ...;
    int y[1..2][1..2]=...;

    execute
    {
    writeln("y=",y);
    }

    dvar float x;

    maximize x;
    subject to {
      x<=maxOfx+sum(i in 1..2, j  in 1..2) y[i][j];
    }

     

    and then you can write

    int a[1..2][1..2];

    main {
      var source = new IloOplModelSource("sub.mod");
      var cplex = new IloCplex();
      var def = new IloOplModelDefinition(source);
      var opl = new IloOplModel(def,cplex);
     
     
      for(var k=11;k<=15;k++)
      {
      var opl = new IloOplModel(def,cplex);
     
     
        
      var data2= new IloOplDataElements();
      data2.maxOfx=k;
    data2.y=thisOplModel.a;
    data2.y[1][1]=k;
      opl.addDataSource(data2);
     
      opl.generate();

      if (cplex.solve()) {
         writeln("OBJ = " + cplex.getObjValue());
      } else {
         writeln("No solution");
      }
    data2.end();
     opl.end();
     
     
    }  
     
    }

     

    which will give

     

    y= [[11 0]
             [0 0]]
    OBJ = 22
    y= [[12 0]
             [0 0]]
    OBJ = 24
    y= [[13 0]
             [0 0]]
    OBJ = 26
    y= [[14 0]
             [0 0]]
    OBJ = 28
    y= [[15 0]
             [0 0]]
    OBJ = 30
     

     

    Regards

     

     

     


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 3.  Re: Update values of data 2 dimensional arrays in opl main script

    Posted Sat December 07, 2013 04:08 PM

    Originally posted by: 6A0Q_Hartioun_Arzoumanian


    Hello Alex,

    It gives error on the following line:

    data2.y=thisOplModel.a;

    The element a doesn't exist in the OPL model.


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 4.  Re: Update values of data 2 dimensional arrays in opl main script

    Posted Sun December 08, 2013 02:12 AM

    Hi,

    are you sure you have not forgotten

    int a[1..2][1..2];

    in the main model ?

    Which version do you use ?

    Regards


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 5.  Re: Update values of data 2 dimensional arrays in opl main script

    Posted Sun December 08, 2013 03:55 PM

    Originally posted by: 6A0Q_Hartioun_Arzoumanian


    This id my code:

     

    /*********************************************
     * OPL 12.5.1.0 Model
     * Author: Harut
     * Creation Date: 06/12/2013 at 16:18:01
     *********************************************/
    int a[1..11][1..5];
    main {          
    var src = new IloOplModelSource("project.mod");    
    var def = new IloOplModelDefinition(src);     
    var cplex = new IloCplex();      
    var model = new IloOplModel(def, cplex);     
    var data = new IloOplDataSource("project.dat");
    var data2 = new IloOplDataElements();
     
    data2.d1 = 1;
    data2.vMMapping = thisOplModel.a;
     
    model.addDataSource(data2); 
    model.addDataSource(data);
    model.generate(); 
    model.modelArray;   
      cplex.epgap=0.01;    
     
     
      var var_2d = new Array(model.nVirtMachines);
       for (var i=0; i<model.nVirtMachines; i++) { 
         var_2d[i] = new Array(model.nDataCenters);
         for(var j=0; j<model.nDataCenters; j++) { 
           var_2d[i][j] = 0;
         }
       }
     for (var dataCenter = 1; dataCenter <= model.nDataCenters; dataCenter++) {
        
        cplex.clearModel();
        model = new IloOplModel(def, cplex);
        data2.d1 = dataCenter;
        
        model.addDataSource(data2); 
        model.addDataSource(data);
        model.generate();
          
      if (cplex.solve()) {       
      writeln("The cost is " + cplex.getObjValue()); 
     
        for (var i=0; i<model.nVirtMachines; i++) { 
          for(var j=0; j<model.nDataCenters; j++) { 
            var_2d[i][j] += model.xvd[i+1][j+1];
          }
        }
      //writeln(model.xvd);  
      //writeln(x);   
            //var_2d += model.xvd;
     
        } else {         
        writeln("Not solution found");    
        } 
        
      }       write("[");
      for (var i=0; i<model.nVirtMachines; i++) { 
      write("[");
          for(var j=0; j<model.nDataCenters; j++) { 
            write(var_2d[i][j]);
          }
          write("]"); 
        }
        write("]");     
        model.end();     
        data.end();     
        def.end();     
        cplex.end();     
        src.end(); 
        //writeln(x);
        }; 

     

    and it doesnt work


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 6.  Re: Update values of data 2 dimensional arrays in opl main script

    Posted Mon December 09, 2013 02:25 AM

    Hi,

     

    you should try to adapt the code I sent you.

    Or after enough effort, you may attach project.mod and project.dat so that other participants can have a look

     

    Regards

     


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 7.  Re: Update values of data 2 dimensional arrays in opl main script

    Posted Mon May 15, 2017 03:15 AM

    Originally posted by: Hakeem-Ur-Rehman


    HI, Please help me to know that how can I take the solution of one model as input to the second model. Actually,  I am solving the problem on rolling horizon basis where I want to solve the 1st-period model after solving it I need to take the solution 1st model as input to the second model. Please help me in this regards. Thanks in Advance   


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 8.  Re: Update values of data 2 dimensional arrays in opl main script



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