Originally posted by: Crubal

Hi, I have a following question:

Given 

int Resources = ...;

range Interchanges = 1..Resources;

 tuple flow    {int i; int j;}
 setof(flow) Flows  = {<i,j> | ordered i,j in Interchanges};
 float distance_flow[Flows] = ...;

I would like to define a 0/1 parameter path_flow according to whether distance_flow[<i,j>] is greater than R(known) or not. 

I tried the following code, but it has bugs.

 execute {
    for (ordered i,j in Interchanges) {if (distance_flow[<i,j>]<= R) 
    {
    path_flow[<i,j>] == 1};
    else 0;
    }     
 }

Could you help me with that?

Thanks!

Note that there is a separate forum dedicated to OPL. OPL related questions should be asked there.

In your case I think you don't need an execute block. You can just say:

int path_flow[f in Flows] = distance_flow[f] <= R ? 1 : 0;

to define that parameter (note that in your code 'Flows' is exactly the same as 'ordered i,j in Interchanges').

Originally posted by: Crubal

I see, thanks Daniel!