[SciPy-user] linalg.qr factorization so slow...

Stefan van der Walt stefan@sun.ac...
Fri Aug 24 11:58:57 CDT 2007


On Fri, Aug 24, 2007 at 08:19:28AM -0400, Jose Unpingco wrote:
> I have a 1000  x 1000  matrix. To apply a QR factorization in Matlab takes less
> than three seconds. however, when I do scipy.linalg.qr on the same matrix, it
> takes 25+ minutes.
>  
> Why is this? I thought they were running the same LAPACK/ATLAS/BLAS libraries
> underneath.

It is because Enthought's install is not linked to your ATLAS.  You
may have to compile SciPy yourself.

Cheers
Stéfan


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