Sometimes you wi only want part of an array. 'Slicing' arrays is the way to do it in python. For example, the expression data[a: b] gives the subarray with elements from a to b-1 from data. If either a or b are omitted the slice goes from the beginning or to the end. With multi-dimensional data, slices are still separated by commas, e.g. data[a:b,c:d]

Create a program that adds the first and third columns of the following data, then prints the result (Thene should be 5 numbers in the result)

import numpy as np

data = up.array([[ 1, 2, 3, 4]

[4,3,2,1]

[-1,1,-1,1]

[o,o,1,o]

[9,16,4,25]])