take first two columns of numpy array 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: how to get the first few lines of an ndarray
In [11]: a[:,:2]
Out[11]:
array([[-0.57098887, -0.4274751 ],
[-0.22279713, -0.51723555],
[ 0.67492385, -0.69294472],
[ 0.41086611, 0.26374238]])