[Numpy-discussion] Generalised inner product

Peter Creasey p.e.creasey.00@googlemail....
Mon May 19 05:23:22 CDT 2008


Hi,

Does numpy have some sort of generalised inner product? For example I have
arrays

a.shape = (5,6,7)
b.shape = (8,7,9,10)

and I want to perform a product over the 3rd axis of a and the 2nd of b,
i.e.

c[i,j,k,l,m] = sum (over x) of a[i,j,x] * b[k,x,l,m]

I guess I could do it with swapaxes and numpy.dot or numpy.inner but I
wondered if there was a general function.

Thanks,
Peter
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