[SciPy-user] singular value decomposition

David Cournapeau david@ar.media.kyoto-u.ac...
Wed Sep 17 03:12:13 CDT 2008


Chris Lee wrote:
> Hi All,
>
> I have code that needs to repeatedly perform an svd on a matrix (2304,
> 2304) shape. It seems to take forever to do (I haven't timed it, but
> approximately two hours passed on the first trial (without completion)
> and I am now running a second to make sure nothing went wrong.
>
> Is this because I am not linked to an optimized BLAS/LAPACK library or
> something else?

Have you tested your scipy atlas ? 2 hours sounds awfully long, and this
may be due to some bugs caused during a wrong build (for example, errors
in the masrhalling of arguments at the C/Fortran interface),

cheers,

David


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