Save GAP - Xpress-MP | Google Groups

Message from discussion Save GAP

Chris Oakley

More options 30 Apr 2008, 11:52

From: "Chris Oakley" <chris.oak...@dashoptimization.com>

Date: Wed, 30 Apr 2008 11:52:22 +0100

Local: Wed 30 Apr 2008 11:52

Subject: RE: Save GAP

  Reply to author
  |
  Forward | Print | View thread
  | Show original
  | Report this message | Find messages by this author
  

There isn't a direct way to retrieve the gap but you can get the value for
best bound and mipobjval and calculate it yourself either at the end or in
the intsol callback at each mip solution.

|mipobjval-bestbound| / mipobjval.

There is an error in the documentation for miprelstop.

Chris.

________________________________
Dash Optimization - part of Fair Isaac
tel: +44 1926 315862
www.dashoptimization.com
optimization everywhere

> -----Original Message-----
> From: xpressmp@googlegroups.com [mailto:xpressmp@googlegroups.com] On
> Behalf Of cees
> Sent: 30 April 2008 11:36
> To: Xpress-MP
> Subject: Re: Save GAP

> Sorry, I don't no either. But, perhaps a workaroung would be
> sufficient: What for do you want to save the GAP? I just need it to
> analyze my results afterwards, and therefore I just save the standard
> output stream of the console to a file using fselect.

> On 29 Apr., 18:49, ANGELUS <zaafrane.s...@gmail.com> wrote:
> > HELLO!

> > there is no function for saving the gap. i am also interesyting about
> > that. the only way i found for saving the gap is copying it.

> > On 27 mar, 13:05, "Ana Rodrigues" <amgrodrig...@gmail.com> wrote:

> > > Hello!
> > > How can I save the GAP? Is there a function for that?

> > > Thanks
> > > --
> > > Ana Rodrigues

Reply to author Forward