On May 17, 2008, at 9:34 AM, David Cournapeau wrote:

> Nripun Sredar wrote:

>> I have a sparse matrix 416x52. I tried to factorize this matrix using

>> svd from numpy. But it didn't produce a result and looked like it is

>> in an infinite loop.

>> I tried a similar operation using random numbers in the matrix. Even

>> this is in an infinite loop.

>> Did anyone else face a similar problem?

>> Can anyone please give some suggestions?

>

> Are you on windows ? What is the CPU on your machine ? I suspect

> this is

> caused by windows binaries which shipped blas/lapack without support

> for

> "old" CPU.

I have seen this issue as well, on Windows XP running on a Core2 Duo.

(But... it was a virtualized environment with VirtualBox, so I don't

know if that disables the SSE features.)

Anyhow, this was with the latest windows binaries, I think

(numpy-1.0.4.win32-py2.5.msi), and had the same issue: infinite loop

with 100% processor doing a SVD. (Non-sparse array, though.)

Zach

_______________________________________________

Numpy-discussion mailing list

[hidden email]
http://projects.scipy.org/mailman/listinfo/numpy-discussion