[Numpy-discussion] Would a patch with a function for incrementing an array with advanced indexing be accepted?

John Salvatier jsalvati@u.washington....
Tue Jun 26 13:48:13 CDT 2012


Right, that makes sense. Thanks.

On Tue, Jun 26, 2012 at 11:34 AM, Frédéric Bastien <nouiz@nouiz.org> wrote:

> Hi,
>
> I think he was referring that making NUMPY_ARRAY_OBJECT[...] syntax
> support the operation that you said is hard. But having a separate
> function do it is less complicated as you said.
>
> Fred
>
> On Tue, Jun 26, 2012 at 1:27 PM, John Salvatier
> <jsalvati@u.washington.edu> wrote:
> > Can you clarify why it would be super hard? I just reused the code for
> > advanced indexing (a modification of PyArray_SetMap). Am I missing
> something
> > crucial?
> >
> >
> >
> > On Tue, Jun 26, 2012 at 9:57 AM, Travis Oliphant <travis@continuum.io>
> > wrote:
> >>
> >>
> >> On Jun 26, 2012, at 11:46 AM, John Salvatier wrote:
> >>
> >> Hello,
> >>
> >> If you increment an array using advanced indexing and have repeated
> >> indexes, the array doesn't get repeatedly
> >> incremented,
> http://comments.gmane.org/gmane.comp.python.numeric.general/50291.
> >> I wrote a C function that does incrementing with repeated indexes
> correctly.
> >> The branch is here (https://github.com/jsalvatier/numpy see the last
> two
> >> commits). Would a patch with a cleaned up version of a function like
> this be
> >> accepted into numpy? I'm not experienced writing numpy C code so I'm
> sure it
> >> still needs improvement.
> >>
> >>
> >> This is great.   It is an often-requested feature.   It's *very
> difficult*
> >> to do without changing fundamentally what NumPy is.  But, yes this
> would be
> >> a great pull request.
> >>
> >> Thanks,
> >>
> >> -Travis
> >>
> >>
> >>
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> >
> >
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