[Clp] Is the project still maintained?
Haroldo Gambini Santos
haroldo.santos at gmail.com
Thu Mar 27 09:28:54 EDT 2014
The usual way of calling CLP is through the Open Solver Interface (OSI)
This is a nice tutorial:
http://www.coin-or.org/Presentations/CORSINFORMSWorkshop04/coin-osi.pdf
On 27-03-2014 06:43, Dimitris Tzionas wrote:
> Thank you all very much for your answers!
>
> Haroldo is right at the point I think.
> It is a great thing that Clp is still alive and well, as you say, but
> it seems that the documentation of GLPK and lpsolve is more welcoming
> for a newcomer.
>
> Could you please propose some resources like simple problem-oriented
> tutorials/code snippets that ease the learning curve?
> As said, my problem is very easy, and with GLPK I had something
> running quite easy,
> but I would be interested in using something more modern,
> so that any learning curve at this point will work as an investment
> for future, more complex needs.
>
> I was planning to use Clp and Osi (as Miles also kindly proposes), but
> finding nice resources seems to be not the easiest job.
>
> Thank you again,
> dimitris
>
>
>
>
> On Thu, Mar 27, 2014 at 2:40 AM, Haroldo Gambini Santos
> <haroldo.santos at gmail.com <mailto:haroldo.santos at gmail.com>> wrote:
>
> Not only actively supported but it is much faster than other open
> source LP solvers (i.e. several times faster and more stable than
> GLPK or LPSolve).
>
> This is one big difference from GLPK, for example, GLPK has a
> great documentation, but lacks performance and stability in my
> experience.
>
> Cheers,
>
>
>
> On 26-03-2014 20:40, Julian Hall wrote:
>
> Dear Dimitris
>
> Clp is certainly actively supported and is used so much that
> you can be confident that it will be around for a long time to
> come. Its author [John Forrest] continues to fix bugs in
> it---not that they come up very often---and other people in
> the COIN-OR community help to keep related interface software
> up-to-date.
>
> However, for various reasons, I can't see much scope for
> bringing documentation up-to-date or developing it further.
> Although I'm Project Manager, I'm in no position to develop
> John's code, and I don't think anyone else is, or is likely
> to. My assessment of it is that it's pretty good as a revised
> simplex solver and to improve it significantly would require a
> lot of work and probably a major re-write. Who might have the
> time to do this, I cannot imagine.
>
> There's still a lot that can be learned from it: Miles Lubin
> incorporated some utilities into the work I did with him, and
> my recent PhD [Qi Huangfu] also studied it. Indeed, if you're
> looking for "a nice linear programming library with a nice c++
> API" then maybe it's time that I made Qi's simplex solver
> available: it's very concise and its performance is comparable
> with that of Clp. This has been on my "to do" list since Qi
> finished a year ago so it isn't going to happen before the
> summer---which in Scotland might mean never!
>
> I'd advise you to use Clp and post any queries to
> clp at list.coin-or.org <mailto:clp at list.coin-or.org>. There are
> great folk on this list who seem happy to give advice that I
> can't.
>
> All the best,
>
> Julian
>
> I'm looking for a nice linear programming library with a
> nice c++ API
> (preferably not old-fashioned c-like).
> Although my current problem is small and simple, it would
> be nice to gain
> familiarity with a library that has a sustainable future.
> I'm looking into coin's Clp, but I'm a bit confused
> regarding the status of
> the project.
> Most pages seem to be very old, while some examples were
> uploaded only 12
> months ago.
> Could you please comment on the project's status?
> Is it actively maintained?
>
> Best,
> dimitris
>
>
>
>
> Julian Hall (Operational Research MSc Programme Director)
> --
> Dr. J. A. Julian Hall, Senior Lecturer, School of Mathematics,
> University of Edinburgh, JCMB, King's Buildings, EDINBURGH,
> EH9 3JZ, UK.
> Room: 6221 Phone: [+44](131) 650 5075 Email:
> J.A.J.Hall at ed.ac.uk <mailto:J.A.J.Hall at ed.ac.uk>
> Fax: [+44](131) 650 6553 Web:
> http://www.maths.ed.ac.uk/people/show/person/47
>
>
> --
> ==================================================
> Haroldo Gambini Santos
> D.Sc, Computer Science
> Universidade Federal de Ouro Preto
> http://www.decom.ufop.br/haroldo/
>
>
>
>
> _______________________________________________
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> Clp at list.coin-or.org
> http://list.coin-or.org/mailman/listinfo/clp
--
==================================================
Haroldo Gambini Santos
D.Sc, Computer Science
Universidade Federal de Ouro Preto
http://www.decom.ufop.br/haroldo/
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