numpy.rot90() in Python (original) (raw)

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

import numpy as geek

array = geek.arange( 12 ).reshape( 3 , 4 )

print ( "Original array : \n" , array)

print ( "\nArray being rotated 4 times : \n" , geek.rot90(array, 4 ))

print ( "\nRotated array : \n" , geek.rot90(array))

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