[Numpy-discussion] Distance Matrix speed

Robert Kern robert.kern at gmail.com
Sat Jun 17 16:49:16 CDT 2006


Alex Cannon wrote:
> How about this?
> 
> def d5():
>     return add.outer(sum(A*A, axis=1), sum(B*B, axis=1)) - \
>                             2.*dot(A, transpose(B))

You might lose some precision with that approach, so the OP should compare
results and timings to look at the tradeoffs.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco





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