numpy.flip¶
-
numpy.
flip
(m, axis)[source]¶ Reverse the order of elements in an array along the given axis.
The shape of the array is preserved, but the elements are reordered.
New in version 1.12.0.
Parameters: m : array_like
Input array.
axis : integer
Axis in array, which entries are reversed.
Returns: out : array_like
A view of m with the entries of axis reversed. Since a view is returned, this operation is done in constant time.
Notes
flip(m, 0) is equivalent to flipud(m). flip(m, 1) is equivalent to fliplr(m). flip(m, n) corresponds to
m[...,::-1,...]
with::-1
at position n.Examples
>>> A = np.arange(8).reshape((2,2,2)) >>> A array([[[0, 1], [2, 3]],
- [[4, 5],
- [6, 7]]])
>>> flip(A, 0) array([[[4, 5], [6, 7]],
- [[0, 1],
- [2, 3]]])
>>> flip(A, 1) array([[[2, 3], [0, 1]],
- [[6, 7],
- [4, 5]]])
>>> A = np.random.randn(3,4,5) >>> np.all(flip(A,2) == A[:,:,::-1,...]) True