Re: [Help-glpk] Suggestions to solve the master problem faster in a Branch-and-Price model.

2014-03-24 Thread Sylvain Fournier
Thanks for your answer Andrew. When I have to remove a basic variable, I fix its bound using the GLP_FX constant as Heinrich suggested, and when I have to remove a non-basic constraint, I unbind it using GLP_FR, before removing them from the problem object in a further iteration where the variable

[Help-glpk] Access the LP relaxation solution in lp_intopt

2014-03-24 Thread Rohit Girdhar
Hi, Is there some way to access the LP Relaxation solution that is found before integer optimization begins in glp_intopt() function? Thanks, -- *rohit* ___ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk

Re: [Help-glpk] Suggestions to solve the master problem faster in a Branch-and-Price model.

2014-03-24 Thread Andrew Makhorin
When I have to remove a basic variable, I fix its bound using the GLP_FX constant as Heinrich suggested, and when I have to remove a non-basic constraint, I unbind it using GLP_FR, before removing them from the problem object in a further iteration where the variable is no more basic or

Re: [Help-glpk] Access the LP relaxation solution in lp_intopt

2014-03-24 Thread Andrew Makhorin
Is there some way to access the LP Relaxation solution that is found before integer optimization begins in glp_intopt() function? Specify --nomip option for glpsol, in which case integrality constraints are ignored. Using the option -o filename or -w filename you may write the solution to a