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

[Michael Hennebry]

On Fri, 28 Jun 2013, chris wrote:

> 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?

> > Look up callbacks.

> 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.

I was mistaken.  glp_simplex does not do callbacks.

If, as I previously inferred, you have a continous LP,
one solves it with glp_simplex.
To get the behaviour requested, one would have to edit the source code.
Print every solution after phase 1.

If you have an MILP, GLP_IBINGO is probably what you want.
Why it is not working for you, I do not know.
IIRC there are differences in how one fetches
solutions from glp_simplex and from glp_intopt.

--
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