[Numpy-discussion] max argmax combo
Charles R Harris
charlesr.harris at gmail.com
Tue Sep 19 12:21:19 CDT 2006
On 9/19/06, Francesc Altet <faltet at carabos.com> wrote:
> A Dimarts 19 Setembre 2006 07:18, Charles R Harris va escriure:
> > I note that argsort also produces indexes that are hard to use in the
> > ndim>1 case.
> Perhaps it is worth to mention here that I've always liked to have a
> and argsort() functionality merged in one shot function (or method).
> both separated implies two sorts, while if I'd have such a combo
> the resulting operation would take quite less time.
Do you want both the indexes and index sorted array returned, or just sort
the array using indexes, i.e., something like
IIRC, the old numeric argsort actually did something like this under the
covers but discarded the sorted array.
One can easily stablish kind of a pattern for situations where this could
> happen: in all the 'arg*()' functions. Perhaps I'm wrong in my count, but
> there appear to be only three of such functions in NumPy, namely, argmax,
> argmin and argsort. Adding three additional 'combos' doesn't seem a lot to
> mind, but it can be just 'too much' for more common sense minds.
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