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numpy.rot90() in Python

Last Updated : 08 Mar, 2024

The numpy.rot90() method performs rotation of an array by 90 degrees in the plane specified by axis(0 or 1).
Syntax:

numpy.rot90(array, k = 1, axes = (0, 1))

Parameters :

array : [array_like]i.e. array having two or more dimensions.
k     : [optional , int]No. of times we wish to rotate array by 90 degrees.
axes  : [array_like]Plane, along which we wish to rotate array.

Returns :

rotated copy of array

# Python Program illustrating 
# numpy.rot90() method 
  
import numpy as geek 
  
array = geek.arange(12).reshape(3, 4) 
print("Original array : \n", array) 
  
# Rotating array 4 times : Returns same original array 
print("\nArray being rotated 4 times : \n", geek.rot90(array, 4)) 
  
# Rotating once 
print("\nRotated array : \n", geek.rot90(array)) 
  
# Rotating twice 
print("\nRotated array : \n", geek.rot90(array, 2)) 

Output :

Original array : 
 [[ 0  1  2  3]
 [ 4  5  6  7]
 [ 8  9 10 11]]

Array being rotated 4 times : 
 [[ 0  1  2  3]
 [ 4  5  6  7]
 [ 8  9 10 11]]

Rotated array : 
 [[ 3  7 11]
 [ 2  6 10]
 [ 1  5  9]
 [ 0  4  8]]

Rotated array : 
 [[11 10  9  8]
 [ 7  6  5  4]
 [ 3  2  1  0]]

Note :
These codes won’t run on online IDE’s. Please run them on your systems to explore the working

numpy.roll() in Python

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