-- Travis Oliphant (on a mobile) 512-826-7480
On Jun 28, 2012, at 1:20 AM, Pierre Haessig <pierre.haes...@crans.org> wrote: > Le 28/06/2012 02:34, Nathaniel Smith a écrit : >> >> Yes it does. If you want to avoid this extra copy, and have a >> pre-existing output array, you can do: >> >> np.add(a, b, out=c) > And is there a temporary copy when using inplace operators like: > > c = a.copy() > c += b > > Is there a temporary (c+b) array which is then assigned to c, or is it > really an inplace assignment as the operator += would suggest ? > It really is inplace. As Nathaniel mentioned --- all ufuncs take an out keyword. The inplace mechanism uses this so that one input and the output are the same. Travis > Pierre > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
