This only works (fine) for fdfsolver =========================================================================== Patrick DUPRÉ | | email: pdupre@xxxxxxx 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 4:06 PM > From: "Ranjan Maitra" <maitra.mbox.ignored@xxxxxxxxx> > To: "Community support for Fedora users" <users@xxxxxxxxxxxxxxxxxxxxxxx> > Subject: Re: gsl > > I am late to this thread and confused: isn't there an example in the manual? > > https://www.gnu.org/software/gsl/manual/html_node/Example-programs-for-Nonlinear-Least_002dSquares-Fitting.html#Example-programs-for-Nonlinear-Least_002dSquares-Fitting > > Does this above work? > > Ranjan > > > On Thu, 4 Jun 2015 09:53:59 -0400 Fred Smith <fredex@xxxxxxxxxxxxxxxxxxxxxx> wrote: > > > On Thu, Jun 04, 2015 at 03:30:18PM +0200, Patrick Dupre wrote: > > > > > > const gsl_multifit_fsolver_type T_ ; > > > gsl_multifit_fsolver *s_ = gsl_multifit_fsolver_alloc (&T_, 10, 5); > > > > > > > > > Gives the same > > > Segmentation fault (core dumped) > > > > I installed gsl and gsl-devel, but didn't find any man pages, so I cannot > > tell what it says (or would say) about how to call that function. As a > > result, I had to guess. > > > > perhps it wants you to locally allocate an actual structure instance > > (not merely a pointer) and pass its address? > > > > in that case, remove thne * from the declaration and add the & to the call. > > > > Fred > > > > > > =========================================================================== > > > Patrick DUPRÉ | | email: pdupre@xxxxxxx > > > 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 3:15 PM > > > > From: "Fred Smith" <fredex@xxxxxxxxxxxxxxxxxxxxxx> > > > > To: users@xxxxxxxxxxxxxxxxxxxxxxx > > > > Subject: Re: gsl > > > > > > > > On Thu, Jun 04, 2015 at 02:01:41PM +0100, Jonathan Underwood wrote: > > > > > On 3 June 2015 at 22:23, Patrick Dupre <pdupre@xxxxxxx> 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; > > > > > > > > the other thought I had is that you may need to pass the address of > > > > T_ so the function knows where your local gsl_multifit_fsolver_type > > > > is, so it can store data there. Try passing "&T_" instead. In this case > > > > you wouldn't need to initialize it because the routine will use > > > > the address of your local variable. > > > > > > > > > > > > -- > > > > ---- Fred Smith -- fredex@xxxxxxxxxxxxxxxxxxxxxx ----------------------------- > > > > "For the word of God is living and active. Sharper than any double-edged > > > > sword, it penetrates even to dividing soul and spirit, joints and marrow; > > > > it judges the thoughts and attitudes of the heart." > > > > ---------------------------- Hebrews 4:12 (niv) ------------------------------ > > > > -- > > > > users mailing list > > > > users@xxxxxxxxxxxxxxxxxxxxxxx > > > > To unsubscribe or change subscription options: > > > > https://admin.fedoraproject.org/mailman/listinfo/users > > > > Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct > > > > Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines > > > > Have a question? Ask away: http://ask.fedoraproject.org > > > > > > > -- > > > users mailing list > > > users@xxxxxxxxxxxxxxxxxxxxxxx > > > To unsubscribe or change subscription options: > > > https://admin.fedoraproject.org/mailman/listinfo/users > > > Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct > > > Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines > > > Have a question? 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