[Numpy-discussion] Implementing a "find first" style function

Phil Elson pelson.pub@gmail....
Thu Mar 28 06:04:15 CDT 2013


I've specifically not tuned it, primarily because the get the best tuning
you need to know the likelihood of finding a match. One option would be to
allow users to specify a "probability" parameter which would chunk the
array into size*probability chunks - an additional parameter could then be
exposed to limit the maximum chunk size to give the user control of the
maximum memory overhead that the routine could use.

I'll submit a PR and we can discuss inline.

Thanks for the response Nathaniel.





On 27 March 2013 12:19, Nathaniel Smith <njs@pobox.com> wrote:

> On Tue, Mar 26, 2013 at 9:20 AM, Phil Elson <pelson.pub@gmail.com> wrote:
> > Bump.
> >
> > I'd be interested to know if this is a desirable feature for numpy?
> > (specifically the 1D "find" functionality rather than the "any"/"all"
> also
> > discussed)
> > If so, I'd be more than happy to submit a PR, but I don't want to put in
> the
> > effort if the principle isn't desirable in the core of numpy.
>
> I don't think anyone has a strong opinion either way :-). It seems
> like a fairly general interface that people might find useful, so I
> don't see an immediate objection to including it in principle. It
> would help to see the actual numbers from a tuned version though to
> know how much benefit there is to get...
>
> -n
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