[Coin-discuss] AMPL interface to CLP?

[Robert Fourer]

I would add that the entire AMPL-solver library is open-source, available at
http://www.netlib.org/ampl/solvers/.  Instructions for using the library to
write an AMPL-solver "driver" are at http://www.ampl.com/hooking.html.  Source
for many previously written drivers is also available, in the same location as
the library source, so it's often possible to modify an existing driver rather
than start from scratch.

Leo makes a good point of mentioning the work with LPFML and OSiL, which is
intended to eventually render it unnecessary to write a separate driver for
every modeling-language/solver pair.  I don't think that this will be complete
within the next 6 months, however.

Bob Fourer
4er at iems.northwestern.edu


> -----Original Message-----
> From: coin-discuss-bounces at list.coin-or.org [mailto:coin-discuss-
> bounces at list.coin-or.org] On Behalf Of Leo Lopes
> Sent: Friday, January 06, 2006 5:18 PM
> To: Discussions about open source software for Operations Research
> Subject: Re: [Coin-discuss] AMPL interface to CLP?
> 
> You can use CLP from AMPL by generating LPFML files using a driver
> than then invokes CLP via OSI. You can download the latest LPFML
> distribution for this purpose. Since LPFML is no longer active pending
> the release of the OSiL libraries, you might also consider writing
> your own AMPL OSI driver, which should be fairly simple for the LP
> case. There is a document on the AMPL web site that explains how to do
> it...
> 
> Cheers,
> Leo.
> 
> On 1/6/06, Gardner Pomper <gardner at networknow.org> wrote:
> > Hi,
> >
> > We would like to start using CLP for our ampl models. Does anyone know if
> > there is an AMPL interface for it? Is it just in the package, or is it
> > seperate?
> >
> > Thanks,
> > - Gardner
> >
> >
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> >
> 
> 
> --
> ========================================================================
> Leonardo B. Lopes                                    leo at sie.arizona.edu
> Assistant Professor                                        (520)621-2342
> SIE - University of Arizona  http://www.sie.arizona.edu/faculty/leolopes
> 
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