Hello Claudia > ------------------------------------------------------------ > To: [email protected] > Subject: [Help-glpk] [Fwd: what does the output mean] > Message-ID: <1296131231.2978.2.camel@none> > From: Andrew Makhorin <[email protected]> > Date: Thu, 27 Jan 2011 15:27:11 +0300 > ------------------------------------------------------------ > > -------- Forwarded Message -------- > From: Claudia <[email protected]> > To: [email protected] > Subject: what does the output mean > Date: Thu, 27 Jan 2005 12:09:43 +0100 > > hallo everybody > > I'm quit new in using glpk and I wonder what the > following output means: > > [snip - terminal output]
This page covers GLPK terminal output: http://en.wikibooks.org/wiki/GLPK/Terminal_output > I would like to know what the rows with the "%" mean! > can anybody help me? The % values are the "gap" between the current best solution and the already known LP relaxation (for which there can be no better solution). Gaps are not printed when they are too large. You should see them decrease too if you are lucky! Please find more information here: http://en.wikibooks.org/wiki/GLPK/Terminal_output#MIP_branch_and_cut_output Or consult the official PDF documentation (it is in there somewhere, I am sure of that!). Gap information can be particularly useful when you don't run your model to completion, but still need to say something sensible about the problem -- like whether a given engineering proposal could be cost beneficial. > thanks > claudia Robbie --- Robbie Morrison PhD student -- policy-oriented energy system simulation Technical University of Berlin (TU-Berlin), Germany University email (redirected) : [email protected] Webmail (preferred) : [email protected] [from Webmail client] _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
