[Numpy-discussion] trivial question?

[Charles R Harris]

On Wed, Jun 20, 2012 at 8:58 AM, Neal Becker <ndbecker2 at gmail.com> wrote:

> Maybe I'm being slow, but is there any convenient function to calculate,
> for 2 vectors:
>
> \sum_i \sum_j x_i y_j
>

It factors, just do x.sum()*y.sum().

Chuck
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