Re: [Help-glpk] Basis read/write

[xypron]

Hello Prem

reading the basis in MPS format is implemented in the stand alone solver 
of GLPK 4.26 in file glplpx20.c. You can download it at
ftp://ftp.gnu.org/gnu/glpk/glpk-4.26.tar.gz

Best regards

Xypron

prem swaroop wrote:
> 
> Team
> 
> There #39;s a couple of features documented in 4.34 in the stand-alone
> solver section (Appendix D):
> 
> (Options specific to simplex method)
> 
> --bas filename read initial basis from filename in MPS format
> 
> --wbas filename write nal basis to filename in MPS format
> 
> Both are missing from the glpsol that I built on cygwin/Windows Vista, for
> versions 4.34 as well as 4.39.
> 
> Now, documentation for 4.39 does NOT mention these features - so that
> #39;s at least consistent.
> 
> I suspect this feature existed earlier on.  I think this could be a useful
> feature to keep, and I can quote my case here.
> 
> I am essentially solving a large-ish LP whose parameters are generated by
> incrementing one parameter value.  And so, I dont expect too many changes
> in the solution for a large part of my increments, and hence using a final
> basis for one solution as an initial basis for the next could save a lot
> in time.
> 
> Regards
> Prem
>  
> Team There's a couple of features documented in 4.34 in the
> stand-alone solver section (Appendix D): (Options specific to simplex
> method) --bas filename read initial basis from filename in MPS format 
> --wbas filename write nal basis to filename in MPS format Both are
> missing from the glpsol that I built on cygwin/Windows Vista, for versions
> 4.34 as well as 4.39. Now, documentation for 4.39 does NOT mention these
> features - so that's at least consistent. 
> I suspect this feature existed earlier on.  I think this could be a useful
> feature to keep, and I can quote my case here. I am essentially solving a
> large-ish LP whose parameters are generated by incrementing one parameter
> value.  And so, I dont expect too many changes in the solution for a large
> part of my increments, and hence using a final basis for one solution as
> an initial basis for the next could save a lot in time. 
> Regards Prem 
> 
> _______________________________________________
> Help-glpk mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/help-glpk
> 
> 

-- 
View this message in context: 
http://www.nabble.com/Basis-read-write-tp26047236p26055078.html
Sent from the Gnu - GLPK - Help mailing list archive at Nabble.com.