On Mon, Mar 2, 2009 at 04:19, David Warde-Farley <dwf@cs.toronto.edu> wrote:
On 28-Feb-09, at 12:27 PM, Jonathan Taylor wrote:
This does seem like the only way to write this nicely. Unfortunately, I think this may be wasteful memory wise (in contrast to what the obvious matlab code would do) as it constructs an array with the whole first index intact at first.
True enough, though if I understand correctly, this is only a _view_ onto the original array, and nothing is immediately copied. So it does waste memory creating a view and then a view on the view, but I don't think it's proportional to the size of the returned array.
a[[2,3,6], ...][..., [3,2]] You're doing fancy indexing, so there are copies both times. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco