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: None or int or tuple of ints, optional **
- Axis or axes along which to flip over. The default, axis=None, will flip over all of the axes of the input array. If axis is negative it counts from the last to the first axis.
If axis is a tuple of ints, flipping is performed on all of the axes specified in the tuple.
Changed in version 1.15.0: None and tuples of axes are supported
A view of m with the entries of axis reversed. Since a view is returned, this operation is done in constant time.
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. flip(m) corresponds to m[::-1,::-1,...,::-1] with ::-1 at all positions. flip(m,(0,1)) corresponds to m[::-1,::-1,...] with ::-1 at position0 and position1.
** Examples **
A= np.arange(8).reshape((2,2,2)) A array([[[0,1],[2,3]],[[4,5],[6,7]]]) np.flip(A,0) array([[[4,5],[6,7]],[[0,1],[2,3]]]) np.flip(A,1) array([[[2,3],[0,1]],[[6,7],[4,5]]]) np.flip(A) array([[[7,6],[5,4]],[[3,2],[1,0]]]) np.flip(A,(0,2)) array([[[5,4],[7,6]],[[1,0],[3,2]]]) A= np.random.randn(3,4,5) np.all(np.flip(A,2)== A[:,:,::-1,...])True