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stftb >> stftb > Other > rot90

rot90

rotates the given 2-D array by 90 degrees

Calling Sequence

y = rot90(x, k)

Parameters

x :

a 2D array.

k :

an integer which specifies how many 90-degree rotations are to be applied.

Description

Return a copy of x with the elements rotated counterclockwise in 90-degree increments. The second argument is optional, and specifies how many 90-degree rotations are to be applied (the default value is 1). Negative values of k rotate the matrix in a clockwise direction.

Examples

A = [1 2 3
     4 5 6
     7 8 9];
rot90(A)     // counterclockwise
rot90(A,-1)  // clockwise

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