[Numpy-discussion] Incrementing with advanced indexing: why don't repeated indexes repeatedly increment?

John Salvatier jsalvati@u.washington....
Wed Jun 6 11:48:57 CDT 2012


That does seem like it should work well if len(unique(idx)) is close to
len(x). Thanks!

On Wed, Jun 6, 2012 at 9:35 AM, Robert Kern <robert.kern@gmail.com> wrote:

> On Wed, Jun 6, 2012 at 4:52 PM, Robert Cimrman <cimrman3@ntc.zcu.cz>
> wrote:
>
> > Yes (in that thread), but it applies also adding/assembling vectors into
> a
> > global vector - this is just x[idx] += vals. I linked that discussion as
> that
> > was recent enough for me to recall it, but there were other.
> >
> > Anyway, my point was that a having a function with the "adding"
> semantics in
> > NumPy would be handy.
>
> x += numpy.bincount(idx, vals, minlength=len(x))
>
> --
> Robert Kern
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