[SciPy-User] permutation matrix in LU decomposition
Wed Nov 28 14:35:48 CST 2012
On Wed, Nov 28, 2012 at 9:31 PM, Jason Grout <firstname.lastname@example.org>wrote:
> On 11/28/12 2:00 PM, Ralf Gommers wrote:
> > On Mon, Nov 26, 2012 at 6:21 PM, Jason Grout
> > <email@example.com <mailto:firstname.lastname@example.org>>
> > I just noticed that the permutation matrix P returned in scipy's LU
> > decomposition is the inverse (i.e., transpose) of the permutation
> > returned from Matlab's LU function. In scipy, A = PLU, but in
> > PA=LU . It's just a convention, of course, but perhaps a note
> > this could be added to the relevant table row of
> > http://www.scipy.org/NumPy_for_Matlab_Users?
> > Sure, done. Note that that page is a wiki, so feel free to make more
> > updates.
> I just tried tweaking it a bit, and got this error when I tried to
> submit my edits:
> [Errno 31] Too many links:
> See http://sage.math.washington.edu/home/jason/numpywikierror.html for
> more debugging output.
Seen that before, I think it's an intermittent error. I just managed to
save the same page again.
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