Re: [Help-gsl] about sorting eigenvalues

[Fred Perras]

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> 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
>