Originally posted by: xilinx_zhao

In Linux CPLEX, after command of "optimize", how to just write variables as a vector into a file? I need to use C program to read the value of variables and then do some other calculation. I knew the command "display" can display them, but my problem has millions of variables and I need to output them into a file.
Thank you.
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Originally posted by: xilinxzhao

Why can not I re-login my account? So I register another account to post.
For this question, I mean, after "Optimize" excution, the CPLEX returns a solution. Yes, I care about that solution. But I also want to find out the value of variables on the occasion. For example :

---

Mininize Y
So that :
x1+3*x2+x3+Y<3
2*x1+x2+4*x3+Y<9
x1,x2,x3>0

---

So beside the optimal Y, I also want to find out the value of x1, x2 and x3 when I get minimum Y. And is there any way to print out x1,x2,x3 as a vector into a txt file?
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#OPLusingCPLEXOptimizer

Originally posted by: SystemAdmin

Hi,

did you look at IloOplOutputFile?
After your constraints block, you would need to define a script to write the output you want:

execute {
  var of = new IloOplOutputFile("myResult.txt");
  of.writeln("Y=",Y);
  of.write("[x1,x2,x3] = [",x1,",",x2,",",x3,"]");
  of.close();
}

The content of the text file would then look like:

Y=0
[x1,x2,x3] = [1,0,1]

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