Re: [Help-gsl] Re: non-linear least squares fitting

[Barrett Foat]

> I implement fdf using numerical partial differentiation of f.
>
> This method (numerical partial differentials) appeared to work;
> is this a reasonable approach?

Yes, the df and fdf functions need to caluclate the numerical partial 
derivatives given the current values of the arguments (vector x in the 
docs) and your independent variable data.

To my knowledge, the approach you took is the only reasonable approach.

Barrett Foat