[Numpy-discussion] multiply a lign matrix with a column matrix should return a scalar( matlab yes, numpy no)!!!
laurent.feron at free.fr
laurent.feron at free.fr
Wed Feb 3 17:31:45 EST 2010
Thanks all for your replies...
yes i start with numpy.
i translate a dtw algorithm for voice recogniton from matlab to python
Rgds,
Laurent
----- Mail Original -----
De: "Alan G Isaac" <aisaac at american.edu>
À: "Discussion of Numerical Python" <numpy-discussion at scipy.org>
Envoyé: Mercredi 3 Février 2010 15h36:07 GMT +01:00 Amsterdam / Berlin / Berne / Rome / Stockholm / Vienne
Objet: Re: [Numpy-discussion] multiply a lign matrix with a column matrix should return a scalar( matlab yes, numpy no)!!!
On 2/3/2010 3:08 AM, laurent.feron at free.fr wrote:
> if i multiply two matrix, one with a unique line and the second one
> with a unique column, i should have a scalar
What definition of matrix multiplication is that??
If you really want a scalar product,
ask for it::
>>> import numpy as np
>>> m1 = np.mat('0 1 2')
>>> m2 = m1.T
>>> np.dot(m1.flat,m2.flat)
5
Alan Isaac
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