Array Shapes, Axes, and Broadcasting
To understand how NumPy arrays work in operations, you need to know about shapes and axes.
Shape
Every array has a .shape, which shows how many elements it has in each dimension.
For example, an array with 2 rows and 3 columns has a shape of (2, 3).
Axes
An axis is a direction along which an operation is applied.
axis=0: down the rows (vertical)axis=1: across the columns (horizontal)
You will use axes with functions like sum(), mean(), and others.
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