rot90

rot90(m, k=1, axes=(0, 1))

Rotate an array by 90 degrees in the plane specified by axes. Rotation direction is from the first towards the second axis.

Parameters:

m : ndarray

Array of two or more dimensions.

k : integer

Number of times the array is rotated by 90 degrees.

axes: (2,) array_like

The array is rotated in the plane defined by the axes. Axes must be different.

Returns:

y : ndarray

A rotated view of m.

Notes

rot90(m, k=1, axes=(1,0)) is the reverse of rot90(m, k=1, axes=(0,1)) rot90(m, k=1, axes=(1,0)) is equivalent to rot90(m, k=-1, axes=(0,1))

Examples

>>> m = np.array([[1,2],[3,4]], 'int')
>>> m
array([[1, 2],
       [3, 4]], dtype=int64)
>>> np.rot90(m)
array([[2, 4],
       [1, 3]], dtype=int64)
>>> np.rot90(m, 2)
array([[4, 3],
       [2, 1]], dtype=int64)
>>> m = np.arange(8).reshape((2,2,2))
>>> np.rot90(m, 1, (1,2))
array([[[1., 3.],
        [0., 2.]],

[[5., 7.],

[4., 6.]]])