[Numpy-discussion] matrix norm

Robert Kern robert.kern@gmail....
Mon Oct 22 15:08:52 CDT 2012


On Mon, Oct 22, 2012 at 9:03 PM, Pauli Virtanen <pav@iki.fi> wrote:
> Jason Grout <jason-sage <at> creativetrax.com> writes:
> [clip]
>> I think we've established that the other software mentioned does indeed
>> use the spectral norm by default.  I'm still curious: what was the
>> reason for breaking with the norm (pun intended :)?  Any chance that in
>> a (probably far distant) future release, the norm default could be
>> changed to conform with matlab/octave/mathematica's view of the world?
>> It's not a huge deal to me now that I know to watch out for it, but it
>> did just bite me and a student a few times.
>
> The trail leads to here:
> http://projects.scipy.org/numpy/attachment/ticket/36/numpy-6-norm-change-
> default.diff
>
> Seems like the chances of learning the reason why this change was done
> are pretty slim.

http://mail.scipy.org/pipermail/numpy-discussion/2006-March/019194.html

-- 
Robert Kern


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