[Numpy-discussion] Problem in LinearAlgebra?
Jochen Küpper
jochen at jochen-kuepper.de
Sun Nov 2 08:47:12 CST 2003
On Sun, 02 Nov 2003 17:25:34 +0100 Rob Hooft wrote:
Rob> - lapack_routine = lapack_lite.dgelss
Rob> + lapack_routine = lapack_lite.dgelsd
Well, here the underlying LAPACK routine was changed to the newer and
significantly faster divide-and-conquer routine. (Same holds for
complex version.) This could be the problem, which you should test.
See LAPACK documentation for details.
Nevertheless I would advise against reversing that change, as
performance diffferences can really be large (although I haven't used
either one of these specific functions here). Maybe you can keep a
copy of the old version in your own project if really necessary?
(After all there seems to be some agreement that you were just "lucky"
to find a working algorithm in the first place.)
Greetings,
Jochen
--
Einigkeit und Recht und Freiheit http://www.Jochen-Kuepper.de
Liberté, Égalité, Fraternité GnuPG key: CC1B0B4D
(Part 3 you find in my messages before fall 2003.)
More information about the Numpy-discussion
mailing list