Reverse the order of elements along axis 0 (up/down).

This docstring was copied from numpy.flipud.

Some inconsistencies with the Dask version may exist.

For a 2-D array, this flips the entries in each column in the up/down direction. Rows are preserved, but appear in a different order than before.

Parameters
marray_like

Input array.

Returns
outarray_like

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

fliplr

Flip array in the left/right direction.

flip

Flip array in one or more dimensions.

rot90

Rotate array counterclockwise.

Notes

Equivalent to m[::-1, ...] or np.flip(m, axis=0). Requires the array to be at least 1-D.

Examples

>>> A = np.diag([1.0, 2, 3])
>>> A
array([[1.,  0.,  0.],
[0.,  2.,  0.],
[0.,  0.,  3.]])
>>> np.flipud(A)
array([[0.,  0.,  3.],
[0.,  2.,  0.],
[1.,  0.,  0.]])

>>> A = np.random.randn(2,3,5)
>>> np.all(np.flipud(A) == A[::-1,...])
True

>>> np.flipud([1,2])
array([2, 1])