NumPy Np.Rot90()

The NumPy rot90() function allows the rotating of an array by 90 degrees along a specified axis.

Let us discuss.

Function Syntax

The function syntax is as shown:

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

The function parameters are as shown:

The function returns a copy of the array with the elements rotated along the specified axis by 90 degrees.

The example below shows using the rot90() function with a two-dimensional array.

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# import numpy
import numpy as np
arr = np.array([[1,2,3], [5,6,7]])
print(np.rot90(arr))

The function will rotate the array along the zero axis and return the array as shown:

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[[3 7]
[2 6]
[1 5]]

To rotate an array along the zero axis by 180 degrees, we can do:

1 2	arr = np.array([[1,2,3], [5,6,7]]) print(np.rot90(arr, k=2))

The number of times tells the function to rotate the array along the zero axis by 180 degrees. The above code should return an array as:

1 2	[[7 6 5] [3 2 1]]

This article covered how to rotate an array by 90 degrees along a specified axis using the rot90() function.

Thanks for reading!!