dgesdd error

Fernando Perez fperez.net at gmail.com
Wed Nov 1 22:43:24 CST 2006


On 11/1/06, Travis Oliphant <oliphant.travis at ieee.org> wrote:
>
> Apparently some dgesdd libraries don't actually compute the correct
> value for the work-space size if requested.
>
> This results in an ** ILLEGAL value and program termination from LAPACK.
>
> I've added code in the latest SVN to that particular wrapper to make
> sure the query gives back the minimums at least, but I'd like to see who
> else has the problem.
>
> On my system, doing numpy.linalg.svd on a 25 x 50 array pulled the trigger.
>
> Anybody else have that problem with their lapack library?

Seems fine here:

In [4]: N.linalg.svd(N.random.rand(25,50));

In [5]: N.linalg.svd(N.random.rand(25,50));

In [6]: N.__version__
Out[6]: '1.0.1.dev3423'

Ubuntu Dapper (6.06) box, up to date.  I'm using the ubuntu-supplied
ATLAS and LAPACK, I can give you more info if needed.

Cheers,

f

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