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numpy.fliplr — NumPy v2.3 Manual

numpy.fliplr(m)[source]#

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:

marray_like

Input array, must be at least 2-D.

Returns:

fndarray

A view of m with the columns reversed. Since a view is returned, this operation is \(\mathcal O(1)\).

See also

flipud

Flip array in the up/down direction.

flip

Flip array in one or more dimensions.

rot90

Rotate array counterclockwise.

Notes

Equivalent to m[:,::-1] or np.flip(m, axis=1). Requires the array to be at least 2-D.

Examples

>>> import numpy as np
>>> 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.]])

>>> rng = np.random.default_rng()
>>> A = rng.normal(size=(2,3,5))
>>> np.all(np.fliplr(A) == A[:,::-1,...])
True

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