[Numpy-discussion] Zero row in SVD's unitary matrix on some Mac's
beezer at ups.edu
Tue Apr 26 14:58:07 EDT 2011
On 04/26/2011 11:25 AM, Pauli Virtanen wrote:
> I think it is worth testing if this change fixes it. Note that current
> LAPACK docs have the number 7 there instead of 5, so there may really be
> a bug here.
It appears to me the problem is more subtle than just a strict comparison
between the number of rows and the number of columns.
shows a plot of matrix sizes (number of rows on the horizontal, number of
columns on vertical). This is on an OSX 10.5 machine and whereever there is a
dot then the SVD seems to *always* produce a non-unitary V, and the absence of a
dot indicates no failures were found. So maybe a workspace size could be the
More information about the NumPy-Discussion