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Wolfram Language equivalent to Matlab Rot90?

Paul Davidson
Posted 9 years ago

Does anyone know if there is there a wolfram equivalent for the Matlab command Rot90 ?

B = rot90(A) rotates array A counterclockwise by 90 degrees. For multidimensional arrays, rot90 rotates in the plane formed by the first and second dimensions.

B = rot90(A,k) rotates array A counterclockwise by k*90 degrees, where k is an integer.
POSTED BY: Paul Davidson
6 Replies
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Paul Davidson
Paul Davidson
Posted 9 years ago

Thank you evryone for your comments but special thanks to Sander for such a simple solution.
POSTED BY: Paul Davidson
POSTED BY: Sander Huisman

As David said it is very easy to do so:

rotccw = Reverse@*Transpose; (* defines a function to do counterclockwise rotation *)
rotcw = Transpose@*Reverse;  (* and clockwise rotation *)

a = Partition[Range[16], 4];
MatrixForm[a]
MatrixForm[rotcw[a]]
MatrixForm[rotccw[a]]
POSTED BY: Sander Huisman
David Keith
David Keith
Posted 9 years ago
POSTED BY: David Keith

For Graphics look up Rotate, and for vectors look up RotationTransform or RotationMatrix.

POSTED BY: David J M Park Jr

This is not what the OP asks for. Rot90 'rotates' a matrix in 90 degree steps (http://fr.mathworks.com/help/matlab/ref/rot90.html). Not rotation like Rotate, RotationTransform, RotationMatrix.
POSTED BY: Sander Huisman
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