[Numpy-discussion] trivial question?

Robert Kern robert.kern@gmail....
Wed Jun 20 10:01:08 CDT 2012

On Wed, Jun 20, 2012 at 3:58 PM, Neal Becker <ndbecker2@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
> (I had a matrix once, but it vanished without a trace)

np.multiply.outer(x, y).sum()

Robert Kern

More information about the NumPy-Discussion mailing list