Re: [Fwd: Hello. I need a example to use GLPK java for MIP.]

On 05/16/2018 01:39 PM, Andrew Makhorin wrote:
> -------- Forwarded Message --------
> To: [email protected] <[email protected]>
> Subject: Hello. I need a example to use GLPK java for MIP.
> Date: Wed, 16 May 2018 10:39:46 +0000 (UTC)
> 
> Dear help-glpk.
> 
> 
> I'm a student learning optimization.
> 
> 
> I'm doing optimization modeling in JAVA.
> 
> 
> However, there are only 1-dimension variables among the existing
> examples
> Can you give me an example that has more than 2-dimensional variables?
> 
> 
> For example,
> If the objective function is sum (s in S, p in P) x (s, p)

Hello Minjun,

sets (like S and P) are not supported by the GLPK library. So you have 
to create a column for each combination of s and p in your own Java coding.

If that looks too tedious, the code at
https://www.xypron.de/projects/linopt/
might help you. See the example a
https://www.xypron.de/projects/linopt/examples.html

Best regards

Heinrich

> 
> 
> forall (s in S, p in P) x (s, p) is_binary
> I want to show it in java.
> 
> 
> Could you pass me some more difficult examples than the example in the
> existing folder?
> 
> 
> Thank you.
> 
> 
> Best regards.
> 
> 
> 
> _______________________________________________
> Help-glpk mailing list
> [email protected]
> https://lists.gnu.org/mailman/listinfo/help-glpk
>