rot90 (MATLAB Function Reference)

Rotate matrix 90°

Syntax

B = rot90(A)
B = rot90(A,k)

Description

B = rot90(A)

rotates matrix A counterclockwise by 90 degrees.

B = rot90(A,k)

rotates matrix A counterclockwise by k*90 degrees, where k is an integer.

Examples

The matrix

X =
    1    2    3
    4    5    6
    7    8    9

rotated by 90 degrees is

Y = rot90(X)
Y =
    3    6    9
    2    5    8
    1    4    7