Is there a numpy method to create a 2D array from the addition of two 1D arrays?

Question

Basically, s_{i,j} = a_i + b_j

if n=len(a) and m=len(b), then s.shape is (n,m). Thus, the addition a

Answer 1

Yes, there actually is. numpy ufuncs have an outer method:

s = np.add.outer(a, b)