numpy.fliplr
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numpy.fliplr(m)
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Reverse the order of elements along axis 1 (left/right).
For a 2-D array, this flips the entries in each row in the left/right direction. Columns are preserved, but appear in a different order than before.
- Parameters
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marray_like
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Input array, must be at least 2-D.
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- Returns
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fndarray
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A view of
m
with the columns reversed. Since a view is returned, this operation is \(\mathcal O(1)\).
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See also
Notes
Equivalent to
m[:,::-1]
ornp.flip(m, axis=1)
. Requires the array to be at least 2-D.Examples
>>> A = np.diag([1.,2.,3.]) >>> A array([[1., 0., 0.], [0., 2., 0.], [0., 0., 3.]]) >>> np.fliplr(A) array([[0., 0., 1.], [0., 2., 0.], [3., 0., 0.]])
>>> A = np.random.randn(2,3,5) >>> np.all(np.fliplr(A) == A[:,::-1,...]) True
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https://numpy.org/doc/1.21/reference/generated/numpy.fliplr.html