[Numpy-discussion] Sum of the product of three or more arrays

Geoffrey Zhu zyzhu2000@gmail....
Thu Oct 18 18:07:46 CDT 2007

I think I figured out: sum(X*Y*Z).

Never mind.

On 10/18/07, Geoffrey Zhu <zyzhu2000@gmail.com> 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 )
> I am not sure if there is a vectorized way to do this.
> Thanks,
> Geoffrey

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