numpy.rollaxis
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numpy.rollaxis(a, axis, start=0)
[source] -
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
. Themoveaxis
function was added in NumPy 1.11.- Parameters
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-
andarray
-
Input array.
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axisint
-
The axis to roll backwards. The positions of the other axes do not change relative to one another.
-
startint, optional
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The axis is rolled until it lies before this position. The default, 0, results in a “complete” roll.
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- Returns
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resndarray
-
For NumPy >= 1.10.0 a view of
a
is always returned. For earlier NumPy versions a view ofa
is returned only if the order of the axes is changed, otherwise the input array is returned.
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See also
Examples
>>> a = np.ones((3,4,5,6)) >>> np.rollaxis(a, 3, 1).shape (3, 6, 4, 5) >>> np.rollaxis(a, 2).shape (5, 3, 4, 6) >>> np.rollaxis(a, 1, 4).shape (3, 5, 6, 4)
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Licensed under the 3-clause BSD License.
https://numpy.org/doc/1.18/reference/generated/numpy.rollaxis.html