Find common values between two NumPy arrays

In NumPy, we can find common values between two arrays with the help intersect1d(). It will take parameter two arrays and it will return an array in which all the common elements will appear.

Syntax: numpy.intersect1d(array1,array2)

Parameter :Two arrays.

Return :An array in which all the common element will appear.

Example 1:

Python

import numpy as np


ar1 = np.array([0, 1, 2, 3, 4])
ar2 = [1, 3, 4]

# Common values between two arrays
print(np.intersect1d(ar1, ar2))

Output:

[1,3,4]

Example 2:

Python

import numpy as np


ar1 = np.array([12, 14, 15, 16, 17])
ar2 = [2, 4, 5, 6, 7, 8, 9, 12]

# Common values between two arrays
print(np.intersect1d(ar1, ar2))

Output:

[12]