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[Help-gsl] Re: non-linear least squares fitting
From: |
Richard Henwood |
Subject: |
[Help-gsl] Re: non-linear least squares fitting |
Date: |
Wed, 05 Dec 2007 13:31:59 +0000 |
User-agent: |
KNode/0.10.4 |
Jay Howard wrote:
> Thanks for the help, Barrett. My responses follow yours:
>
>> Typical usage would be to use gsl_multifit_fdfsolver_lmsder or
>> gsl_multifit_fdfsolver_lmsder as the gsl_multifit_fsolver_type. Look at
>> the variable "T" in the example here:
>> http://www.gnu.org/software/gsl/manual/html_node/Example-programs-for-Nonlinear-Least_002dSquares-Fitting.html
>
> I was hoping to avoid using the fdfsolver set of calls because they
> require that I furnish df() and fdf() functions, which I'm not clear
> on how to implement based on f().
<snip>
Hi folks,
Since you are on this topic I thought I would introduce my experience;
fitting a log-normal distribution (f) with two degrees of freedom to data.
I implement fdf using numerical partial differentiation of f.
This method (numerical partial differentials) appeared to work;
is this a reasonable approach?
or am I missing something;
thanks for your thoughts;
r
- [Help-gsl] non-linear least squares fitting, Jay Howard, 2007/12/04
- Re: [Help-gsl] non-linear least squares fitting, Barrett C. Foat, 2007/12/04
- Re: [Help-gsl] non-linear least squares fitting, Jay Howard, 2007/12/04
- Re: [Help-gsl] non-linear least squares fitting, Barrett C. Foat, 2007/12/05
- Re: [Help-gsl] non-linear least squares fitting, Jay Howard, 2007/12/05
- Re: [Help-gsl] non-linear least squares fitting, Barrett Foat, 2007/12/05
- Re: [Help-gsl] non-linear least squares fitting, Jay Howard, 2007/12/05
- [Help-gsl] Re: non-linear least squares fitting,
Richard Henwood <=
- Re: [Help-gsl] Re: non-linear least squares fitting, Barrett Foat, 2007/12/05
- [Help-gsl] Re: Re: non-linear least squares fitting, Richard Henwood, 2007/12/06
- Re: [Help-gsl] Re: Re: non-linear least squares fitting, Barrett C. Foat, 2007/12/06
- Re: [Help-gsl] Re: Re: non-linear least squares fitting, Jay Howard, 2007/12/07
- Re: [Help-gsl] Re: Re: non-linear least squares fitting, Barrett C. Foat, 2007/12/10