numpy.rot90(m, k=1)[source]
Rotate an array by 90 degrees in the counter-clockwise direction.
The first two dimensions are rotated; therefore, the array must be at least 2-D.
Parameters: |
m : array_like Array of two or more dimensions. k : integer Number of times the array is rotated by 90 degrees. |
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Returns: |
y : ndarray Rotated array. |
>>> m = np.array([[1,2],[3,4]], int) >>> m array([[1, 2], [3, 4]]) >>> np.rot90(m) array([[2, 4], [1, 3]]) >>> np.rot90(m, 2) array([[4, 3], [2, 1]])
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https://docs.scipy.org/doc/numpy-1.11.0/reference/generated/numpy.rot90.html