Hello all,
I have some trouble understanding how I can pass an initial basis to
GLPK. First of all, with my LP-class, roughly 80-90% of the time is
spent with constructing an initial feasible solution. Now of course I'd
like to improve this time.
Since I am load balancing a number of flows in a g
Hello,
I've got a question about LP initial basis.
I create a problem, then optimize it, and save status for variables and
constraints, and delete the problem.
I create a new problem, early the same as the first one : I only remove
some variables (and so modify/remove some constraints).
Is the
> Now I read the GLPK manual and I know that I can only set the status of
> a variable, not the actual value. What I don't know is, what a basic
> and
> a non-basic variable is. What's the difference of an active and
> non-active constraint? As you already guessed, Linear Programming is
> not
> my
Ulrich Spörlein wrote:
> Hello all,
>
> I have some trouble understanding how I can pass an initial basis to
> GLPK. First of all, with my LP-class, roughly 80-90% of the time is
> spent with constructing an initial feasible solution. Now of course I'd
> like to improve this time.
>
> Since I am
On Fri, 18 Nov 2005, Brady Hunsaker wrote:
> Ulrich Spörlein wrote:
> > I have some trouble understanding how I can pass an initial basis to
> > GLPK. First of all, with my LP-class, roughly 80-90% of the time is
> > spent with constructing an initial feasible solution. Now of course I'd
> > like
> I've got a question about LP initial basis.
> I create a problem, then optimize it, and save status for variables and
> constraints, and delete the problem.
> I create a new problem, early the same as the first one : I only remove
> some variables (and so modify/remove some constraints).
> Is th
On Wed, 16 Sep 2009, Andrew Makhorin wrote:
I create a problem, then optimize it, and save status for variables and
constraints, and delete the problem.
I create a new problem, early the same as the first one : I only remove
some variables (and so modify/remove some constraints).
Is there a way,
