Hello Wafa, unfortunately the current release does not support accessing dual values in glpsol in the post processing phase.
I have suggested to patch GLPK to allow this. You can download the patched source using subversion: svn co svn://glpk.dyndns.org/svn/glpk/glpk/branches/glpk-4.35-dot/ For variables you can access lower bound (lb), upper bound (ub), dual value (dual), value (val) of a variable x[3] like this: x[3].dual x[3].lb x[3].ub x[3].val For constraints you can access lower bound (lb), upper bound (ub), dual value (dual) of a constraint C[3] like this: c[3].dual c[3].lb c[3].ub Best regards Xypron Wafa.Rezig wrote: > > > Hello, > > I am using "result" command > to access the decision variables in GLPK, but dont know how to access the > shadow prices (marginal price)? > Is there any documentation about all > commands. > Thanks > > Wafa Rezig > OR Analyst > AISystems, Belgium > Phone: +32-2-558-88-23 > Mobile: +32-478-54-39-57 > > Legal disclaimer > > This electronic message contains information that is confidential. The > information is intended to be for the use of the addressee only. > If you are not the addressee we appreciate your notification in this > respect > and please note that any disclosure, copy, distribution or use of the > contents > of this message is prohibited and may be unlawful. We have taken every > reasonable precaution to ensure that any kind of attachment to this e-mail > has been swept for viruses. However, we cannot accept liability for any > damage sustained as a result of software viruses and would advise that > you carry out your own virus checks before opening any attachment. > > Hello, > > I am using "result" command > to access the decision variables in GLPK, but dont know how to access the > shadow prices (marginal price)? > Is there any documentation about all > commands. > Thanks > > Wafa Rezig > OR Analyst > AISystems, Belgium > Phone: +32-2-558-88-23 > Mobile: +32-478-54-39-57 > > Legal disclaimer > > This electronic message contains information that is confidential. The > information is intended to be for the use of the addressee only. > If you are not the addressee we appreciate your notification in this > respect > and please note that any disclosure, copy, distribution or use of the > contents > of this message is prohibited and may be unlawful. We have taken every > reasonable precaution to ensure that any kind of attachment to this e-mail > has been swept for viruses. However, we cannot accept liability for any > damage sustained as a result of software viruses and would advise that > you carry out your own virus checks before opening any attachment. > _______________________________________________ > Help-glpk mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/help-glpk > > -- View this message in context: http://www.nabble.com/Accessing-shadow-prices-in-stand-alone-LP-Solver-tp22080364p22086838.html Sent from the Gnu - GLPK - Help mailing list archive at Nabble.com. _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
