[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Help-glpk] Why some answers missed

From: Andrew Makhorin
Subject: Re: [Help-glpk] Why some answers missed
Date: Tue, 1 Jul 2008 16:24:27 +0400

> I used a C program to form a gmpl program to solve my problem,for it
> has a huge number of variables.But some of the answers were missed,for
> example(I copied a part of the answers)
>   3851 wx[w1]       B             -2                             
>   3852 wx[w2]       B             -2                             
>   3853 wx[w3]       B             -2                             
>   3854 wx[w4]       B             -2                             
>   3855 wx[w5]       B             -2                             
>   3856 wx[w6]       B             -2                             
>   3857 wx[w14]      B             -2                             
>   3858 wx[w19]      B             -2                             
>   3859 wx[w21]      B              0                             

> In this case,w7-w13 and w15-w18 were missed.How did it happen? And I
> want to use these answers in another program,so I wonder if the
> answers had been stored in arrays or anything that I can read
> directly(not read the answers form a output file)

Elemental variables wx[w7], wx[8], etc. do not appear in any
constraint, so the mathprog translator does not generate them.
From the formal point of view such variables may have any value in
optimal solution.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]