How can I use NumPy to flatten a multi-dimensional array?

How can I use NumPy to flatten a multi-dimensional array?

You can use the numpy.flatten() method to flatten a multi-dimensional array into a 1D array. For example, if you have an array arr, you can do arr.flatten().

Are there other methods to flatten an array?

Yes, you can also use numpy.ravel() which returns a flattened array, but it returns a view whenever possible.

What’s the difference between flatten and ravel?

The main difference is that flatten() always returns a copy, while ravel() returns a view when possible, which is more memory efficient.

Can I flatten a specific axis of a multi-dimensional array?

To flatten a specific axis, you can use numpy.reshape() to reshape the array as needed before flattening.