On Mon, Aug 10, 2009 at 9:07 AM, Koldo Ramirez<koldo.ramirez@xxxxxxxxx
> Hello Thomas
> I suppose Minpack 2 is based in version 1 as they present it as an
> improvement focusing in large scale problems and using Blas and Lapack..
> About the Octave reference is just to show that an important project like
> Octave has considered Minpack.
> Best regards
> 2009/8/8 Thomas Capricelli <orzel@xxxxxxxxxxxxxxx
>> In data lunedì 27 luglio 2009 10:13:58, Koldo Ramirez ha scritto:
>> > It exists Minpack version 2. Between other advantages it uses BLAS and
>> > LAPACK. This is the presentation (
>> > http://ftp.mcs.anl.gov/pub/MINPACK-2/README
>> > http://www-new.mcs.anl.gov/otc/minpack/summary.html
>> It doesn't seem to be related to minpack actually. only the name is the
>> i think it's not based on the minpack code. is it ?
>> > ..., the old minpack code is gone. ...
>> > Essentially the same method as in minpack is used - double
>> > dogleg
>> > trust region steps with Broyden updating of the jacobian. For
>> > large
>> > enough (no. of variables > 10) square and overdetermined(!)
>> > systems, the QR factorization of the jacobian is updated rather than the
>> > jacobian itself, avoiding costly re-factorizations. Broyden updating may
>> > be
>> > switched off by the user, yielding plain levenberg-marquardt method.
>> interesting to not, those are things we could do later on. I still prefer
>> considering minpack currently has it has a lot broader user test range.
>> Thomas Capricelli <orzel@xxxxxxxxxxxxxxx