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[Help-glpk] [Fwd: creating subsets from other sets with numeric clauses]

From: Andrew Makhorin
Subject: [Help-glpk] [Fwd: creating subsets from other sets with numeric clauses]
Date: Mon, 03 Mar 2014 12:17:29 +0400

-------- Forwarded Message --------
From: Javad Ahmadi <address@hidden>
To: address@hidden <address@hidden>
Subject: creating subsets from other sets with numeric clauses
Date: Mon, 3 Mar 2014 03:37:10 +0000


I am trying the create a subset based on content of a data set in GMPL.


Using the assign,mod in examples directory – 


param c{i in I, j in J}, >= 0;

/* cost of allocating task j to agent i */

param d {(i,j) in I cross J: c[i,j]=12} := c[i,j];

display d;

set E := {(i,j) in I cross J: d[i,j]>0};

display E;



Display statement at line 33

d[1,4] = 12

d[2,1] = 12

d[4,5] = 12

d[5,7] = 12

Display statement at line 35

assign.mod:35: d[1,1] out of domain

MathProg model processing error


Parameter d is created correctly, but set E is not!  What is the correct
way of creating such subsets based on parameter clause(s)?






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