numpy.rot90
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numpy.rot90(m, k=1, axes=(0, 1))
[source] -
Rotate an array by 90 degrees in the plane specified by axes.
Rotation direction is from the first towards the second axis.
- Parameters
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marray_like
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Array of two or more dimensions.
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kinteger
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Number of times the array is rotated by 90 degrees.
- axes: (2,) array_like
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The array is rotated in the plane defined by the axes. Axes must be different.
New in version 1.12.0.
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- Returns
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yndarray
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A rotated view of
m
.
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See also
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]]) >>> np.rot90(m) array([[2, 4], [1, 3]]) >>> np.rot90(m, 2) array([[4, 3], [2, 1]]) >>> m = np.arange(8).reshape((2,2,2)) >>> np.rot90(m, 1, (1,2)) array([[[1, 3], [0, 2]], [[5, 7], [4, 6]]])
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https://numpy.org/doc/1.19/reference/generated/numpy.rot90.html