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Re: [Help-glpk] GLPK in R vs. AMPL
From: |
Andrew Makhorin |
Subject: |
Re: [Help-glpk] GLPK in R vs. AMPL |
Date: |
Wed, 26 May 2010 01:25:03 +0400 |
Hello,
> I #8217;m running an LP through the R version of GLPK
> (http://cran.r-project.org/web/packages/glpk/index.html)
> and comparing the results with what I get out of AMPL (using the cplex
> solver, but that #8217;s probably not important).
> While in AMPL I get a reasonable answer so the model should be ok, in
> GLPK cannot find an optimal solution. I think it #8217;s to do with
> the absolute value constraints that I am using. I wanted to know if
> anyone else was having a similar issue, and how it was fixed.
If your model is LP, you can use glpsol, the stand-alone glpk lp/mip
solver which supports the modeling language GNU MathProg, a subset of
AMPL.
All questions concerning the R version of glpk should probably be
addressed to its author(s), because that development is not part of
the glpk project.
Andrew Makhorin