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Re: duplicate fminsearch


From: Olaf Till
Subject: Re: duplicate fminsearch
Date: Fri, 30 Aug 2013 09:47:17 +0200
User-agent: Mutt/1.5.21 (2010-09-15)

On Thu, Aug 29, 2013 at 02:16:27PM -0400, Andy Adler wrote:
> Hi Daniel,
> 
> As far as I can tell, the fminsearch in octave is the one I sent to
> Rik in July last year.
> It was an effort at packaging and documenting (+ new options) to the version 
> in
> octave-forge.
> 
> The old one can go, IMHO.
> --
> Andy Adler <address@hidden> +1-613-520-2600x8785
> 
> 
> On 29 August 2013 13:31, Daniel J Sebald <address@hidden> wrote:
> > On 08/29/2013 10:25 AM, John W. Eaton wrote:
> >>
> >> There are different fminsearch functions in Octave and the Octave Forge
> >> optim package. Which one should be deleted?
> >>
> >> jwe
> >
> >
> > Well, Andy should probably address that:
> >
> > changeset:   14895:e0525ecf156e
> > parent:      14893:55d0f8d70fe9
> > date:        Fri Jul 20 09:25:37 2012 -0700
> > description:
> > Add new function fminsearch.m
> >
> > The difference looks to be that fminsearch.m in Octave is a standalone
> > script-code implementation whereas the fminsearch.m in optim package uses
> > fmins.m which in turn uses nmsmax.m as well as a few others. fmins(),
> > nmsmax() are not available in Octave.  Searching through optim package, it
> > doesn't appear that a special library or anything is needed, it is just that
> > there are a number of extra files over which the work is distributed.
> >
> > Dan

Yes, fminsearch in optim uses Etiennes option scheme. Now the optimset
scheme prevails and it is probably better not to maintain two
different schemes. So I'd say stick to the version in Octave. But
first it would be necessary to provide nmsmax.m, called by
fminsearch.m, in Octave, too.

Olaf

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