[Numpy-discussion] Reordering indices
rjd4+numpy at cam.ac.uk
Fri May 30 11:48:45 EDT 2014
Is there a clean way to create a view on an existing ND-array with its
axes in a different order.
For example, suppose I have an array of shape (100,200,300,3) and I
want to create a view of this where the vector coordinate is axis 0, not
axis 3. (So the view will have shape (3,100,200,300).)
Reading the help(numpy.ndarray) output I can't find anything better than
repeated calls to swapaxes():
>>> B = A.swapaxes(0,3).swapaxes(1,3).swapaxes(2,3)
Is there a "reorder_axes()" method that would let me write something
>>> B = A.reorder_axes((3,0,1,2))
Apologies in advance if I've missed the obvious method in the docs.
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