numpy.fliplr — NumPy v2.2 Manual (original) (raw)

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