[Numpy-discussion] tensor dot ?

Nadav Horesh nadavh at visionsense.com
Sat Aug 26 08:45:39 CDT 2006


I once wrote a function "tensormultiply" which is a part of numarray (undocumented). You can borrow it from there.

  Nadav


-----Original Message-----
From:	numpy-discussion-bounces at lists.sourceforge.net on behalf of Simon Burton
Sent:	Fri 25-Aug-06 14:42
To:	numpy-discussion at lists.sourceforge.net
Cc:	
Subject:	[Numpy-discussion] tensor dot ?


>>> numpy.dot.__doc__
matrixproduct(a,b)
Returns the dot product of a and b for arrays of floating point types.
Like the generic numpy equivalent the product sum is over
the last dimension of a and the second-to-last dimension of b.
NB: The first argument is not conjugated.

Does numpy support summing over arbitrary dimensions,
as in tensor calculus ?

I could cook up something that uses transpose and dot, but it's
reasonably tricky i think :)

Simon.

-- 
Simon Burton, B.Sc.
Licensed PO Box 8066
ANU Canberra 2601
Australia
Ph. 61 02 6249 6940
http://arrowtheory.com 

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