Re: [Help-glpk] glpk multiple solutions from solver

[xypron . glpk]

Hello Chris,

you may need to switch off the presolver.

Best regards

Heinrich Schuchardt

http://www.xypron.de

Am 28.06.13 um 08:05 schrieb chris

> On Sat, Jun 15, 2013 at 9:57 PM, Michael Hennebry <
> 
> address@hidden> wrote:
> 
> 
> 
> >  On Thu, 13 Jun 2013, chia jia wei wrote:
> 
> >
> 
> > On Wed, Jun 12, 2013 at 7:31 PM, Raniere Silva <address@hidden>**
> 
> >> wrote:
> 
> >>
> 
> >>  In the case of solving the problem using glp_simplex, is there any way
> 
> >>>> to
> 
> >>>> retrieve the solution in between iterations?
> 
> >>>>
> 
> >>>
> 
> >>> AFAIK, using glp_simplex it isn't possible. Take a look in chapter 4
> 
> >>> "Advanced
> 
> >>> API Routines" of the manual to some functions that can do that.
> 
> >>>
> 
> >>> Raniere
> 
> >>>
> 
> >>>
> 
> >> Do you have any simple example to illustrate the possibility of using the
> 
> >> advanced routines to achieve retrieving of multiple solutions?
> 
> >>
> 
> >
> 
> > Look up callbacks.
> 
> >
> 
> > --
> 
> > Michael   address@hidden
> 
> > "On Monday, I'm gonna have to tell my kindergarten class,
> 
> > whom I teach not to run with scissors,
> 
> > that my fiance ran me through with a broadsword."  --  Lily
> 
> 
> 
> 
> 
> Thanks for the advice.
> 
> I've tried to use the simplex algo to obtain an optimal basis.
> 
> Then, I made attached the callback listener,  implemented printout of
> 
> solution at GLP_IBINGO, and used glp_intopt but i seem to be getting
> 
> solutions that do not relate to the original problem data.
> 
> 
> 
> Regards,
> 
> chris