Originally posted by: iturkmen

Hi,

I have binary decision variables which have 4 indices. I also use tuple in my variables. My decision variables looks like Xa,b,c,d .
Let say 100 binary variables and there are only variables which are equal to 1 after run the model. How can I get the indices of the decision variables which are equal to 1?

my variables looks like this in the solution file:
X=http://1100000000000001000111...
X<1,2,3,5>=1

How can I get "1,2,3,5"?

Thanks.
#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: SystemAdmin

here is an example:

tuple T { int a; int b; int c; int d; };
 {T} setOfT = {<a,b,c,d> | a in 1..5, b in 1..5, c in 1..5, d in 1..5};
 
 dvar boolean x[setOfT];
 
 subject to {
   x[<1,2,3,5>] == 1;
   x[<2,3,4,5>] == 1;
 }    
 
 {T} oneIndices = {t | t in setOfT : x[t] == 1};
 
 execute {
   writeln(oneIndices);
 }

Regards,
Faisal
#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: iturkmen

Hi,
Thank you so much. It works :) I am sorry for the missing words and brackets.
#DecisionOptimization
#OPLusingCPLEXOptimizer