[Numpy-discussion] Sum of the product of three or more arrays
Robert Kern
robert.kern@gmail....
Thu Oct 18 18:08:06 CDT 2007
Geoffrey Zhu wrote:
> Hi All,
>
> Given three vectors of the same lengths, X, Y, and Z, I am looking for
> an efficient way to calculate the following:
>
> sum(x[i]*y[i]*z[i], for i=1..n )
(x*y*z).sum()
--
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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