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

Geoffrey Zhu zyzhu2000@gmail....
Thu Oct 18 18:00:56 CDT 2007


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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