[Clp] Clp Digest, Vol 91, Issue 7

[Greg Gruber]

That's exactly what I was looking for, thanks!

Greg
On Wed, Sep 26, 2012 at 12:00 PM, <clp-request at list.coin-or.org> wrote:

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>    1. Re: specifying random number seed with CLP (John Forrest)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 26 Sep 2012 13:15:17 +0100
> From: John Forrest <john.forrest at fastercoin.com>
> To: clp at list.coin-or.org
> Subject: Re: [Clp] specifying random number seed with CLP
> Message-ID: <5062F1D5.3000406 at fastercoin.com>
> Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"
>
> Greg,
>
> In Clp/trunk I have added randomSeed which allows you to set an initial
> seed.  If set to 0 then uses time of day to generate a random seed.
>
> If you want to use Clp/stable then it should be easy to patch if you
> look at differences in 1883.  CbcOrClpParam.?pp have changed and I also
> had to fix a benign "bug" which stopped changes being made (ClpModel.cpp)
>
> I attach a file showing three runs.  Is that what you wanted?
>
> John Forrest
>
>
>
> On 24/09/12 22:12, Greg Gruber wrote:
> > Hello,
> > I am using the clp.exe command line tool to solve a model that I have
> > coded with GLPK.  It is working fine, but I would like to make
> > successive runs using a random numbers to change some parameters.
> > With glpsol I can do the following:
> > glpsol --seed ? -m foo.mod -d foo.dat
> > and a different random number seed will be used each time. When I
> > solve using clp, I do the following:
> > clp foo.mod%foo.dat -solve
> > But I get the same result each time, because it is using the same
> > random number seed.
> > Is there a way to force a new seed?
> > Thanks,
> > Greg Gruber
> >
> >
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> End of Clp Digest, Vol 91, Issue 7
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