Re: [Help-glpk] Modelisation of a subset

[Meketon, Marc]

What you have seems to work.  I created variables (all forced to 1 just to display something interesting)

 

set I;

param J {i in I }>0, integer ;

set K {i in I }:=1..J[i];

 

var V{i in I, j in K[i]}, =1;

 

minimize SumOfV : sum{i in I, j in K[i]} V[i,j];

solve;

display V;

 

data;

 

param : I : J :=

1       1  

2       1 

3       2

4       2

5       3 ;

 

end;

 

When I ran this, the “display” statement produced

 

V[1,1].val = 1

V[2,1].val = 1

V[3,1].val = 1

V[3,2].val = 1

V[4,1].val = 1

V[4,2].val = 1

V[5,1].val = 1

V[5,2].val = 1

V[5,3].val = 1

 

Which meets your specifications.

 

From: help-glpk-bounces+address@hidden [mailto:help-glpk-bounces+address@hidden On Behalf Of esma mehiaoui
Sent: Tuesday, June 16, 2015 7:46 AM
To: GLPK Help List
Subject: [Help-glpk] Modelisation of a subset

 

Hello Everyone,

 

I need to express a set of elements for each element in a set. I had a syntax errors with the following formulation :

 

.MOD

set I := 1..5;

param J {i in I }>0, integer ;

set K {i in I }:=1..J[i];

 

 

.DATA

 

param J :=
1       1  
2       1 
3       2
4        2
5        3 ;

 

My objective is to define the variables  V{i in I, j in K[i] }= {V[1,1]; V[2,1]; V[3,1]; V[3,2] ;V[4,1]; V[4,2]; V[5,1] ;V[5,2]; V[5,3]}

Do you have any idea how to do this ?

 

Best regards

Esma

---

This e-mail and any attachments may be confidential or legally privileged. If you received this message in error or are not the intended recipient, you should destroy the e-mail message and any attachments or copies, and you are prohibited from retaining, distributing, disclosing or using any information contained herein. Please inform us of the erroneous delivery by return e-mail. Thank you for your cooperation.