I have those arrays:
a = np.array([
[1,2],
[3,4],
[5,6],
[7,8]])
b = np.array([1,2,3,4])
and I want them to multiply like so:
[[1*1, 2*1],
[3*2, 4*2],
[5*3, 6*3],
[7*4, 8*4]]
... basically out[i] = a[i] * b[i]
, where a[i].shape
is (2,)
and b[i]
then is a scalar.
What's the trick? np.multiply
seems not to work:
>>> np.multiply(a, b)
ValueError: operands could not be broadcast together with shapes (4,2) (4)
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