From octave-sources-request at bevo dot che dot wisc dot edu Mon Nov 26 08:23:11 2001
Subject: Re: Levenberg-Marquardt algorithm
From: Paul Kienzle <pkienzle at users dot sourceforge dot net>
To: Francesco Potorti` <pot at gnu dot org>
CC: Matthias Jueschke <matthias at physik3 dot gwdg dot de>,        octave-sources@bevo.che.wisc.edu
Date: Mon, 26 Nov 2001 09:22:35 -0500

Francesco Potorti` wrote:

>    here is my version of the Levenberg-Marquardt algorithm, I found no
>    version for octave in the net.
>
> I have this: <ftp://fly.cnuce.cnr.it/ftp/pub/software/octave/leasqr/>.
> I don't know if that's better or worse, but it is not under GPL.  It
> may probably be, but I have been lazy and have not asked all authors.
> If you compare it with yours, and you intend to put yours under the
> GPL, we can have a good free one for Octave.

I asked all the authors, and it is now under the GPL.  I've included it in
octave-forge  (http://octave.sf.net).

I see that NIST has some data sets for non-linear regression with expected
results (http://www.itl.nist.gov/div898/strd/nls/nls_main.shtml).  You can use
these to check both versions, and if both are correct we should use the one
which is faster.

Paul Kienzle
pkienzle at users dot sf dot net