gsl

[Patrick Dupre]

Thank,

I know the fdfsolver works fine but not the fsolver which do not require
the derivatives

===========================================================================
 Patrick DUPRÉ                                 | | email: pdupre at gmx.com
 Laboratoire de Physico-Chimie de l'Atmosphère | |
 Université du Littoral-Côte d'Opale           | |
 Tel.  (33)-(0)3 28 23 76 12                   | | Fax: 03 28 65 82 44
 189A, avenue Maurice Schumann                 | | 59140 Dunkerque, France
===========================================================================


> Sent: Saturday, June 06, 2015 at 10:54 PM
> From: "Veli-Pekka Kestilä" <fedora at guagua.fi>
> To: "Community support for Fedora users" <users at lists.fedoraproject.org>
> Subject: Re: gsl
>
> On 4.6.2015 16:23, Patrick Dupre wrote:
> >
> > ===========================================================================
> >   Patrick DUPRÉ                                 | | email: pdupre at gmx.com
> >   Laboratoire de Physico-Chimie de l'Atmosphère | |
> >   Université du Littoral-Côte d'Opale           | |
> >   Tel.  (33)-(0)3 28 23 76 12                   | | Fax: 03 28 65 82 44
> >   189A, avenue Maurice Schumann                 | | 59140 Dunkerque, France
> > ===========================================================================
> >
> >
> >> Sent: Thursday, June 04, 2015 at 3:01 PM
> >> From: "Jonathan Underwood" <jonathan.underwood at gmail.com>
> >> To: "Community support for Fedora users" <users at lists.fedoraproject.org>
> >> Subject: Re: gsl
> >>
> >> On 3 June 2015 at 22:23, Patrick Dupre <pdupre at gmx.com> wrote:
> >>> Hello,
> >>>
> >>> Can somebody help me?
> >>>
> >>> This short piece of code fails.
> >>> It seems to be due to the gsl library!
> >>>
> >>> Thank for your help.
> >>>
> >>> #include <gsl/gsl_multifit_nlin.h>
> >>>
> >>> int main () {
> >>>    const gsl_multifit_fsolver_type *T_ ;
> >>>    gsl_multifit_fsolver *s_ = gsl_multifit_fsolver_alloc (T_, 10, 1);
> >>>    }
> >>>
> >>
> >> You haven't initialized T_, so when you call
> >> gsl_multifit_fsolver_alloc, it fails because it doesn't know what
> >> solver type to allocate for.
> >>
> >> So, try initializing it, eg.
> >>
> >> const gsl_multifit_fsolver_type *T_ = gsl_multifit_fdfsolver_lmsder;
> >   warning: initialization from incompatible pointer type [enabled by default]
> >     const gsl_multifit_fsolver_type *T_ = gsl_multifit_fdfsolver_lmsder ;
> >
> > fsolver and fdfsolver are not compatible!
> > I did not find a way to initiate this pointer.
> >
> 
> Try this code:
> #include <gsl/gsl_multifit_nlin.h>
> 
> int main () {
>      const gsl_multifit_fdfsolver_type * T = gsl_multifit_fdfsolver_lmder;
>      gsl_multifit_fdfsolver * s = gsl_multifit_fdfsolver_alloc (T, 100, 3);
> }
> 
> from: http://manpagez.com/info/gsl-ref/gsl-ref-1.12/gsl-ref_507.php
> 
> Atleast I got it to compile and run without segfaults.
> 
> -vpk
> 
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