w3resource

NumPy: Find the set difference of two arrays

NumPy: Array Object Exercise-20 with Solution

Write a NumPy program to find the set difference of two arrays. The set difference will return the sorted, unique values in array1 that are not in array2.

Pictorial Presentation:

Python NumPy: Find the set difference of two arrays

Sample Solution:-

Python Code:

import numpy as np
array1 = np.array([0, 10, 20, 40, 60, 80])
print("Array1: ",array1)
array2 = [10, 30, 40, 50, 70]
print("Array2: ",array2)
print("Unique values in array1 that are not in array2:")
print(np.setdiff1d(array1, array2))

Sample Output:

Array1:  [ 0 10 20 40 60 80]                                           
Array2:  [10, 30, 40, 50, 70]                                          
Unique values in array1 that are not in array2:                        
[ 0 20 60 80]

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a NumPy program to get the unique elements of an array.
Next: Write a NumPy program to find the set exclusive-or of two arrays. Set exclusive-or will return the sorted, unique values that are in only one (not both) of the input arrays.

What is the difficulty level of this exercise?

Test your Python skills with w3resource's quiz



Python: Tips of the Day

List comprehension:

>>> m = [x ** 2 for x in range(5)]
>>> m
[0, 1, 4, 9, 16]