tensor product

Tim Hochberg tim.hochberg at ieee.org
Mon Oct 9 08:01:01 CDT 2006


Charles R Harris wrote:
> Hi Nadav,
>
> On 10/8/06, *Nadav Horesh* <nadavh at visionsense.com 
> <mailto:nadavh at visionsense.com>> wrote:
>
>
>     There is a "tensortdot" function in numpy1.0rc1
>
>
>
> The tensordot is not the same thing as a tensor product. What I want 
> is the following:
>
> def tensor(a, b) :
>     """Tensor product of a and b
>    
>     """
>     a = asarray(a)
>     b = asarray(b)
>     return outer(a, b).reshape(a.shape + b.shape)
>
Is this not the same things as numpy.multiply.outer(a, b)? (as opposed 
to outer(a, b), which appears to pretend that everything is a vector -- 
I'm not sure what the point of that is).

-tim



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