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Re: [Help-glpk] [Fwd: A Request]
From: |
Heinrich Schuchardt |
Subject: |
Re: [Help-glpk] [Fwd: A Request] |
Date: |
Sat, 05 Sep 2015 23:21:44 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.8.0 |
Hello Shaghaeygh,
your mail had to be forwarded manually because you are not subscribed to
GLPK help list, cf.
https://lists.gnu.org/mailman/listinfo/help-glpk
In the GMPL language you can use the table statement to write the
results of your models LP1 and LP2 to CSV files or to a SQL database.
In LP3 you can read that data.
The table statement is described in doc/gmpl.pdf of the source
distribution available at ftp://ftp.gnu.org/gnu/glpk/glpk-4.55.tar.gz
Examples are available in examples/sql and examples/csv.
Please, also have a look at the following pages:
https://en.wikibooks.org/wiki/GLPK/ODBC
https://en.wikibooks.org/wiki/GLPK/Table_Statement
Best regards
Heinrich
On 05.09.2015 22:27, Andrew Makhorin wrote:
> -------- Forwarded Message --------
> From: Shaghayegh Mokarami <address@hidden>
> To: address@hidden
> Subject: A Request
> Date: Sat, 5 Sep 2015 18:55:19 +0430
>
> Hi
>
> I'm not very familar to GLPK.
>
>
> My problem contains two LP model, LP1 and LP2 which be solved
> separately.
>
> The variables of model LP1 and LP2 are defined as x[i,j] and y[i,j],
> respectively where
>
> (i,j) in E, and
>
> set E within (V cross V);
>
> set V := 1..n;
>
>
>
> I want to use the optimum solutions of LP1 and LP2, in third LP model
> LP3 as parameters.
>
> For example, LP3 contains these commands:
>
> param x{(i,j) in E};
>
> param y{(i,j) in E};
>
>
>
> var z{(i,j) in E};
>
>
>
>
>
> maximize Val: sum {(i,j) in E} (x(i,j)+ y(i,j))* z(i,j);
>
>
>
> How should I save the optimum values of x[i,j] and y[i,j] such that
> they can be read in LP3 as parameters.
>
>
> Thank you in advanced
>
>
> Shaghayegh
>
>
>
>
>
>
>
>
> _______________________________________________
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>