[SciPy-User] permutation matrix in LU decomposition

Ralf Gommers ralf.gommers@gmail....
Wed Nov 28 14:00:32 CST 2012


On Mon, Nov 26, 2012 at 6:21 PM, Jason Grout <jason-sage@creativetrax.com>wrote:

> I just noticed that the permutation matrix P returned in scipy's LU
> decomposition is the inverse (i.e., transpose) of the permutation matrix
> returned from Matlab's LU function.  In scipy, A = PLU, but in Matlab,
> PA=LU [1].  It's just a convention, of course, but perhaps a note about
> 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.

Ralf
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