[Help-glpk] [Fwd: Re: Help: How to build MIP model]

[Andrew Makhorin]

-------- Forwarded Message --------
From: Matteo Fischetti DEI <address@hidden>
Reply-to: address@hidden
To: Andrew Makhorin <address@hidden>
Subject: Re: [Help-glpk] Help: How to build MIP model
Date: Fri, 04 Jan 2013 15:43:34 +0100

Hi Andrew.

to easy writing a MIP model (in Cplex) using C, I wrote the trivial 
functions below

    www.dei.unipd.it/~fisch/easy_lp.c

I do not know if you have something similar in GLPK, other than MathProg 
of course, that could help beginners to write models with 1-index 
variables (for 2-index var.s similar functions can be written)

Take care

--Matteo--


Il 04/01/2013 15:01, lucacoopers ha scritto:
> First, thanks to all. Jeff you're right. I misspelled my problem. The problem
> is:
>
> minimize { sum[from i=1 to 96] of {c1*x1(i)+c2*x2+c3*x3(i)} }
> with this constraints:
>   x1(i)+x2+x3(i)=c4(i)
>   x1(i)+x3(i)=c5
>   x1(i)>=5
> 0<=x3(i)<=100
> 0<=x2<=1 binary
>
> where x1, x3 and c4 are vectors of 96 elements. c1,c2,c3,c5 are
> numbers.
>
> Sorry for the mistake. I wish someone would write the problem in a form
> similar to that described above. I need to learn how to write a minimization
> problem with glpk with the language c.
>
> thanks again to all:-)


-- 
Prof. Matteo Fischetti
DEI, University of Padova
via Gradenigo 6/A
I-35131 Padova (Italy)
e-mail: address@hidden
web: www.dei.unipd.it/~fisch
reports: www.dei.unipd.it/~fisch/papers