[Numpy-discussion] help vectorizing something

Mathew Yeates mat.yeates@gmail....
Fri Oct 24 16:48:55 CDT 2008


Hi
I  have 2 vectors A and B. For each value in A I want to find the location
in B of the same value. Both A and B have unique elements.

Of course I could something like
For each index of A:
       v =A[index]
       location = numpy.where(B == v)

But I have very large lists and it will take too long.

Thanks to any one of you  vectorization gurus that has any ideas.

Mathew
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