How does the axis parameter from NumPy work?

Question

Can someone explain exactly what the axis parameter in NumPy does?

I am terribly confused.

I\'m trying to use the function myArray.sum(ax

Answer 1

Clearly,

e.shape == (3, 2, 2)

Sum over an axis is a reduction operation so the specified axis disappears. Hence,

e.sum(axis=0).shape == (2, 2)
e.sum(axis=1).shape == (3, 2)
e.sum(axis=2).shape == (3, 2)