Originally posted by: Rym

Hello

 

i'm beginner in IBM OPl, i like t o generate randomly  in .mod file an array of strings in <s,m,l,xl>.

 

I want to have 

 

int n;

range r= 1..n;

int vm[r];

execute

{

for ( var i in vm)

{

vm[i]= ....   ;  .//generate an array with randomly strings with vm[i] in s,m,l,xl

}

};

Example of output:

if i write writeln("vmi=",vmi) i will have : vmi=[s,m,xl,s,l,s,m ]

thanks

 

 

 

 

 

 

 

 

 

#DecisionOptimization
#OPLusingCPLEXOptimizer

Hi,

we can start from the example I gave you at

https://www.ibm.com/developerworks/community/forums/html/topic?id=e0a84b10-59a1-4689-92df-5ad62ce1194d&ps=25

and write

int vm = 20;

    range Rvm = 1..vm;

     

    int DKmin=1;

    int DKmax = 4;

    int disk[i in Rvm]=DKmin+rand(DKmax-DKmin+1);

    string s[DKmin..DKmax]=["s","m","l","xl" ];
    
    string vmi[i in Rvm]=s[disk[i]];
    
    execute
    {
    writeln(vmi);    
    }
    
 

which gives

 

 ["s" "s" "s" "s" "m" "xl" "l" "xl" "l" "s" "xl" "s" "xl" "s" "s" "l" "m" "l" "s" "xl"]

 

regards

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: Rym

Thanks Alex 

 

It's working . I'm in love with IBM OPL 

 

 

#DecisionOptimization
#OPLusingCPLEXOptimizer

Hi,

as said at https://www.ibm.com/developerworks/community/forums/html/topic?id=b9af8791-d383-482a-8c0a-deeb2ebc54c5&ps=25

there is already a work for that : OPLHOLIC

regards

#DecisionOptimization
#OPLusingCPLEXOptimizer

See

Optimization (aka prescriptive analytics) : Should we write the model in a modeling language or a general programming language ?

https://www.linkedin.com/pulse/optimization-aka-prescriptive-analytics-should-we-write-fleischer?trk=hp-feed-article-title-publish

 

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: Rym

Hi

 

I have a a problem when a repeat the statement in loop for: it make me the same result for every step of the loop for .And my pupose is to change the result in every step of the loop for.

 

My model :

 

int cpui[s in V]=1rand(4-1+1);
 

execute

{
writeln(cpui);
}

main

 

{

 

for(var j=1;j<nv;j=j+(min+(Opl.rand(mix))))
{

var masterOpl = new IloOplModel(masterDef, masterCplex);
   var masterData = thisOplModel.dataElements; 
   masterData.v=j;
   masterOpl.addDataSource(masterData);
   writeln("solving with ",j,"  vms");

for (var i=1; i<=NbI;i++)
{  

 

masterOpl.generate();

 

*****

}

}

}

 

the result is

 

[2 2 2 1 4 8 6 7 5 1 8 2 8 1 2 6 3 6 1 8 6 7 6 8]

[2 2 2 1 4 8 6 7 5 1 8 2 8 1 2 6 3 6 1 8 6 7 6 8]

[2 2 2 1 4 8 6 7 5 1 8 2 8 1 2 6 3 6 1 8 6 7 6 8]

[2 2 2 1 4 8 6 7 5 1 8 2 8 1 2 6 3 6 1 8 6 7 6 8]

[2 2 2 1 4 8 6 7 5 1 8 2 8 1 2 6 3 6 1 8 6 7 6 8]

 

My problem is to change the different values by row

 

example

[2 2 2 1 4 8 6 7 5 1 8 2 8 1 2 6 3 6 1 8 6 7 6 8]

[2 2 2 1 2 6 3 6 1 8 1 1 4 2 2 1 4 8 2 2 1 4 8 8]

[ 1 4 2 2 1 4 1 2 6 3 1 4 8  8 2  2  6 3 6 1 8 1 1 ]

*

*

thanks

 

 

#DecisionOptimization
#OPLusingCPLEXOptimizer

Hi,

you have some example at

https://www.ibm.com/developerworks/community/forums/html/topic?id=9ad7f60c-e801-410f-8faf-0a6dcacd00de&ps=25

regards

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: Rym

Thanks Alex

 

But my problem  isn't sloving. The generated sequence is the same at each itteration and i would have( different )distinct sequence at each one.

 

[2 2 2 1 4 8 6 7 5 1 8 2 8 1 2 6 3 6 1 8 6 7 6 8]

[2 2 2 1 2 6 3 6 1 8 1 1 4 2 2 1 4 8 2 2 1 4 8 8]

[ 1 4 2 2 1 4 1 2 6 3 1 4 8  8 2  2  6 3 6 1 8 1 1 ]

and not

 

 

 

 

Thanks

#DecisionOptimization
#OPLusingCPLEXOptimizer

Hi,

let me share some links:

• modifying a value in a main  ==>  https://www.ibm.com/developerworks/community/forums/html/topic?id=243675ee-3045-41b5-ada9-d1613686b44c&ps=25
• updating a 2D array in a main ==> https://www.ibm.com/developerworks/community/forums/html/topic?id=71ac9d4e-fcc6-4ef9-a7c5-8f2a257e5cdd&ps=25
• modifying a set in a main ==> https://www.ibm.com/developerworks/community/forums/html/topic?id=84f171d3-48fe-4d6a-bfed-5d0837185b5e&ps=25

I think you should have a look at the 2nd link here

regards

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: Rym

Hi 

 

It's working but for executing the sentence , i should set  the value of the range a to a static parameter that i think isn't normal think

int v = ...;
range V = 1..v;
int VM[V] = ...;
int a[1..300];

main
{
  var masterDef = thisOplModel.modelDefinition;
  var masterCplex = cplex;
    var masterOpl = new IloOplModel(masterDef, masterCplex); 
  var masterData = thisOplModel.dataElements;
 
 
  for(var h=1;h<=10;h++)
  {

  var masterOpl = new IloOplModel(masterDef, masterCplex); 
  masterData.v=h;
  masterData.VM=thisOplModel.a;
  for(var q=1;q<=h;q++)
{
  masterData.VM[q]=1+(Opl.rand() % (4 - 1 + 1));
}  
  masterOpl.addDataSource(masterData);
  masterOpl.generate(); 
   }

}

 

 

thanks

#DecisionOptimization
#OPLusingCPLEXOptimizer

Similar question at https://www.ibm.com/developerworks/community/forums/html/topic?id=bba0903e-03f6-4ef4-8e8f-9747a95e7fd8&ps=25#repliesPg=0

#DecisionOptimization
#OPLusingCPLEXOptimizer