Numpy Adding two vectors with different sizes

Question

If I have two numpy arrays of different sizes, how can I superimpose them.

a = numpy([0, 10, 20, 30])
b = numpy([20, 30, 40, 50, 60, 70])

What

Answer 1

Very similar to the one above, but a little more compact:

l = sorted((a, b), key=len)
c = l[1].copy()
c[:len(l[0])] += l[0]

Answer 2

If you know that b is higher dimension, then:

>>> a.resize(b.shape)
>>> c = a+b

is all you need.

Answer 3

This could be what you are looking for

if len(a) < len(b):
    c = b.copy()
    c[:len(a)] += a
else:
    c = a.copy()
    c[:len(b)] += b

basically you copy the longer one and then add in-place the shorter one