mxnet.np.flip

flip(m, axis=None, out=None)

Reverse the order of elements in an array along the given axis.

The shape of the array is preserved, but the elements are reordered.

Parameters

  • m (ndarray or scalar) – 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.

  • out (ndarray or scalar, optional) – Alternative output array in which to place the result. It must have the same shape and type as the expected output.

Returns

out – A view of m with the entries of axis reversed. Since a view is returned, this operation is done in constant time.

Return type

ndarray or scalar

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]]])