[Numpy-discussion] Simplified question on tensordot

Rick Muller rpmuller@gmail....
Fri Sep 3 06:48:31 CDT 2010


Sorry for the rapid repost, but I thought of a much easier way to ask the
question I asked a few minutes ago.

I have two matrices, A and B, both of which are n x m. n is big (~10,000),
and m is small (~10).

I want to take the product AB such that I get a length-n vector, as in:

>>> AB = zeros(n,'d')
>>> for i in xrange(n):
>>>    AB[i] = dot(A[i,:],B[i,:])

only I don't want the for-loop. The various things I've tried with dot and
tensordot inevitably give me a n x n matrix, which isn't what I want. Can
anyone help me find an easier way to do this?

-- 
Rick Muller
rpmuller@gmail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.scipy.org/pipermail/numpy-discussion/attachments/20100903/0339c2e4/attachment.html 


More information about the NumPy-Discussion mailing list