Re: [Help-gsl] about sorting eigenvalues

[Wu Degang]

What you mentioned about sounds like a bug. For my purpose, 
gsl_sort_vector is sufficient.

Thank you.

- Wu

On 29/2/12 11:27 PM, Fred Perras wrote:
> Hello,
>
> I use the gsl_eigen_hermv function for what I do.  Fore some reasons I 
> found it more accurate than the symmv function even for symmetric 
> matrices (although probably slower).  It doesn't seem that there are 
> sorting functions for eigenvalues only although in that case you can 
> use other, regular, c/c++ functions like qsort.
>
> Fred
>
> On Wed, Feb 29, 2012 at 6:20 AM, Wu Degang <address@hidden 
> <mailto:address@hidden>> wrote:
>
>     Hi,
>
>     I have a real symmetric matrix and use gsl_eigen_symm to compute
>     the eigenvalues. After that I need to sort the eigenvalues, but I
>     find in the manual gsl_eigen_symmv_sort, which sorts the
>     eigenvalues as well as the eigenvectors. I just need to sort the
>     eigenvalues. What function should I use?
>
>     regards,
>
>     Wu Degang