numpy slice columns code example

Example 1: How to select parts of a numpy array

import numpy as np

x = np.array([1,2,4,3,5,1,4,2])#create an array...

x[n]#where n is any value from the size of the array 
	#e.g. x[1] is 2, x[5] is 1.

Example 2: numpy how to slice individual columns

X = data[:, [1, 9]]