Originally posted by: SystemAdmin

Here is my problem:

I want to pass the solution value of a dvar (x) in my sub-problem to a parameter (x_bound) in my master-problem.

masterData.x_bound = subOpl.x.solutionValue;

Although x is defined to be non-negative, often the sub-problem returns a few x<0.
Is there a way to avoid this OR change negative values in x to zero OR use an absolute value function on subOpl.x.solutionValue.

The function abs(.) as in:

abs(subOpl.x.solutionValue)

is only defined for OPL scripts and not for main blocks.
#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: SystemAdmin

One work-around is to use abs(.) in my master-problem definition.

// replace all mentions of x_bound with:
abs(x_bound)

#DecisionOptimization
#OPLusingCPLEXOptimizer

Hi,

let me give you 2 ways:

main
{
 var a=-2;
 writeln(Opl.abs(a));
 writeln(Math.abs(a));
  
}

Regards
#DecisionOptimization
#OPLusingCPLEXOptimizer