Roll the specified axis backwards, until it lies in a given position.
This function continues to be supported for backward compatibility, but you
should prefer moveaxis.
a (Tensor) – Input tensor.
axis (int) – The axis to roll backwards. The positions of the other axes do not
change relative to one another.
start (int, optional) – The axis is rolled until it lies before this position. The default,
0, results in a “complete” roll.
res – a view of a is always returned.
Move array axes to new positions.
Roll the elements of an array by a number of positions along a given axis.
>>> import mars.tensor as mt
>>> a = mt.ones((3,4,5,6))
>>> mt.rollaxis(a, 3, 1).shape
(3, 6, 4, 5)
>>> mt.rollaxis(a, 2).shape
(5, 3, 4, 6)
>>> mt.rollaxis(a, 1, 4).shape
(3, 5, 6, 4)