[Numpy-discussion] Problem with numpy.linalg.eig?
david at ar.media.kyoto-u.ac.jp
Thu Nov 15 05:45:17 EST 2007
Michael McNeil Forbes wrote:
> On 13 Nov 2007, at 9:43 AM, Geoffrey Zhu wrote:
>> On Nov 13, 2007 2:37 AM, David Cournapeau <david at ar.media.kyoto-
>> u.ac.jp> wrote:
>>> Geoffrey Zhu wrote:
>>>> Pointer problems are usually random...
>> The original MSI version hangs on numpy.test() if I open IDLE and type
>> import numpy
>> If I try the OP's test first, once it hang on "from numpy.linalg
>> import eig" and the other time it ran successfully. After it ran
>> successfully, it ran numpy.test() successfully, too.
>> As you said, it is random.
> I have also been having random problems with the latest numpy from
> svn built on an Intel core 2 Duo Linux box running in 64 bit mode
> under Red Hat 3.4.6-8 with the gcc 3.4.6 20060404 and ATLAS 3.8.0.
> I am having a problem with numpy.linalg.eigh and complex Hermitian
> matrices. Randomly, I get seemingly correct answers, and then
> eigenvectors full of Nan's (though not completely. The first row the
> the eigenvectors seem to be numbers, but incorrect.)
Which fortran compiler are you using ?
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