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

To understand the axis intuitively, refer the picture below (source: Physics Dept, Cornell Uni)

The shape of the (boolean) array in the above figure is shape=(8, 3). ndarray.shape will return a tuple where the entries correspond to the length of the particular dimension. In our example, 8 corresponds to length of axis 0 whereas 3 corresponds to length of axis 1.