Numpy 2D Array Slicing

Question

import numpy as np

a = np.array([[8, 6, 2], [4, 9, 7], [2, 5, 5]])
print (a[1:3, 1:3])

Could someone explain how the output is:
[[9, 7]
[5, 5]]

Thank y’all!!!

Answer 1

Size of a is 3*3=9 elements.
Slicing command a([ 1:3], [1:3]) indicates take elements - (1st row 1st element to 3rd element - 9,7; 2 nd row 1st element to 3rd element - 5,5).

As there is no 3rd row, elements in 1st row and 2nd row are only printed. Note that, no elements in 0th row;0th column were printed. In python index of elements start from 0.

Hope this helps...!!!

Answer 2

It does! Like a lot lol. Thank you!