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Re: [Help-gsl] change in gsl_multifit_linear_svd


From: Timothée Flutre
Subject: Re: [Help-gsl] change in gsl_multifit_linear_svd
Date: Wed, 5 Oct 2016 10:27:09 +0200

Thanks Patrick!
Tim

2016-09-30 18:00 GMT+02:00 <address@hidden>:

> Message: 1
> Date: Fri, 30 Sep 2016 11:48:34 +0200
> From: Patrick Alken <address@hidden>
> To: <address@hidden>
> Subject: Re: [Help-gsl] change in gsl_multifit_linear_svd
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset="utf-8"
>
> Ok I've added the function
>
> gsl_multifit_linear_rank
>
> which now returns the effective rank of the matrix. It is in the git
> repository
>
> Patrick
>
> On 09/29/2016 04:02 PM, Timoth?e Flutre wrote:
> > Thanks for your answers!
> >
> > Patrick, indeed, after looking at the code, the difference arose between
> > versions 1.16 and 2.0. However, I can't use gsl_multifit_linear because I
> > also need the rank to compute the unbiased estimate of the error
> variance,
> > as well as the p value.
> > The rank was returned before by gsl_multifit_linear_svd, but not anymore.
> > By looking at the current code, I see that the rank is computed inside
> > multifit_linear_solve which is not available via the API.
> >
> > Is there a way to solve this without changing the API again?
> >
> > Tim
> >
> > 2016-09-22 18:00 GMT+02:00 <address@hidden>:
> >
> >> Send Help-gsl mailing list submissions to
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> >>
> >> Today's Topics:
> >>
> >>    1. change in gsl_multifit_linear_svd (Timoth?e Flutre)
> >>    2. Re: change in gsl_multifit_linear_svd (Patrick Alken)
> >>    3. Re: change in gsl_multifit_linear_svd (Mohammad Akhlaghi)
> >>
> >>
> >> ----------------------------------------------------------------------
> >>
> >> Message: 1
> >> Date: Wed, 21 Sep 2016 21:10:57 +0200
> >> From: Timoth?e Flutre <address@hidden>
> >> To: address@hidden
> >> Subject: [Help-gsl] change in gsl_multifit_linear_svd
> >> Message-ID:
> >>         <CAGJVmuLYccg=YvFfRXi5Tsjfa45r2KVzS=t+1Q-
> >> address@hidden>
> >> Content-Type: text/plain; charset=UTF-8
> >>
> >> Hello,
> >>
> >> did gsl_multifit_linear_svd change at some point after GSL 1.16? I
> couldn't
> >> see any mention of it in the NEWS file, but a user reported to me that
> my
> >> code doesn't compile anymore with GSL 2.1.
> >> Could someone add this somewhere in the NEWS file?
> >>
> >> Moreover, does someone know how I can use conditionals with the
> Autotools
> >> (via ./configure) so that, if the user has GSL <= 1.16, the compiled
> code
> >> uses gsl_multifit_linear_svd whereas if the user has GSL >= 2.0 the
> >> compiled code uses gsl_multifit_linear?
> >>
> >> Best,
> >> Tim
> >>
> >>
> >> ------------------------------
> >>
> >> Message: 2
> >> Date: Thu, 22 Sep 2016 06:12:26 +0100
> >> From: Patrick Alken <address@hidden>
> >> To: <address@hidden>
> >> Subject: Re: [Help-gsl] change in gsl_multifit_linear_svd
> >> Message-ID: <address@hidden>
> >> Content-Type: text/plain; charset="utf-8"
> >>
> >> The linear least squares code was rewritten (I think prior to 2.0) so
> >> its possible that the svd routine changed, but I don't remember exactly
> >> what the change was! If there was an API change it should have been done
> >> prior to 2.0 (which was the reason for jumping to 2.0 instead of 1.17).
> >> Sorry for the headache you're having now - the behavior of
> >> gsl_multifit_linear should be the same for both GSL versions - can you
> >> just use that instead?
> >>
> >> On 09/21/2016 08:10 PM, Timoth?e Flutre wrote:
> >>> Hello,
> >>>
> >>> did gsl_multifit_linear_svd change at some point after GSL 1.16? I
> >> couldn't
> >>> see any mention of it in the NEWS file, but a user reported to me that
> my
> >>> code doesn't compile anymore with GSL 2.1.
> >>> Could someone add this somewhere in the NEWS file?
> >>>
> >>> Moreover, does someone know how I can use conditionals with the
> Autotools
> >>> (via ./configure) so that, if the user has GSL <= 1.16, the compiled
> code
> >>> uses gsl_multifit_linear_svd whereas if the user has GSL >= 2.0 the
> >>> compiled code uses gsl_multifit_linear?
> >>>
> >>> Best,
> >>> Tim
> >>
> >>
> >>
> >>
> >> ------------------------------
> >>
> >> Message: 3
> >> Date: Thu, 22 Sep 2016 12:16:48 +0200
> >> From: Mohammad Akhlaghi <address@hidden>
> >> To: address@hidden
> >> Subject: Re: [Help-gsl] change in gsl_multifit_linear_svd
> >> Message-ID: <address@hidden>
> >> Content-Type: text/plain; charset=utf-8; format=flowed
> >>
> >> On 09/21/2016 09:10 PM, Timoth?e Flutre wrote:
> >>
> >>> Moreover, does someone know how I can use conditionals with the
> Autotools
> >>> (via ./configure) so that, if the user has GSL <= 1.16, the compiled
> code
> >>> uses gsl_multifit_linear_svd whereas if the user has GSL >= 2.0 the
> >>> compiled code uses gsl_multifit_linear?
> >> Once installed, GSL also installs an executable script called
> >> "gsl-config". If you run it with the "--version" option, this script
> >> will print the installed version of GSL:
> >>
> >> $ gsl-config --version
> >>
> >> You can use the output of this command, along with "AX_COMPARE_VERSION"
> >> (from the GNU Autoconf Archives) to check for the version. The link
> >> bellow shows how we do it in GNU Astronomy Utilities when we need to
> >> check the version of Ghostscript:
> >>
> >> http://git.savannah.gnu.org/cgit/gnuastro.git/tree/configure.ac
> >> (See the part that starts with the "Check Ghostscript:" comment)
> >>
> >> You don't be needing the check on existance like our Ghostscript check,
> >> since I assume you will be using `AC_SEARCH_LIBS' for GSL's existance.
> >> You just need the indented part after `AC_MSG_CHECKING(Ghostscript
> >> version)'.
> >>
> >> You can then pass the check's result into `config.h' and use the
> >> information in your programming to decide which function to use.
> >>
> >> Cheers,
> >> Mohammad
> >>
> >>
> >>
> >> ------------------------------
> >>
> >> Subject: Digest Footer
> >>
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> >>
> >> ------------------------------
> >>
> >> End of Help-gsl Digest, Vol 154, Issue 8
> >> ****************************************
> >>
>
>
>
>
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>
> Subject: Digest Footer
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> End of Help-gsl Digest, Vol 154, Issue 13
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