Mon, 05 Jul 2010 16:03:56 +0200, Steve Schmerler wrote: [clip] > To sum up, I find it a bit subtle that > a = a - a[...,0][...,None] > works as expected, while > a -= a[...,0][...,None] > does not. > I guess the reason is that in the latter case (and the corresponding > loop), a[...,0] itself is changed during the loop, while in the former > case, numpy makes a copy of a[...,0] ?
Correct. > Is this intended? Not really. It's a "feature" we're planning to get rid of eventually, once a way to do it without sacrificing performance in "safe" cases is implemented. -- Pauli Virtanen _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
