[Rd] weigths in boxplot
erich.neuwirth at univie.ac.at
Thu Aug 25 23:35:45 CEST 2005
Frank Harrell's Hmisc has weigthed variants of quite a few statistical
estimators, including quantiles. I never have look at
how efficiently this is implemented, but as far as I know
Martin Maechler wrote:
>>>>>>"Erich" == Erich Neuwirth <erich.neuwirth at univie.ac.at>
>>>>>> on Sun, 21 Aug 2005 18:51:20 +0200 writes:
> Erich> In R 2.2.0 density now can work with weighted
> Erich> obesrvations. It would be nice if boxplot also would
> Erich> accept a weight parameter, then one could produce
> Erich> consistent density estimators and boxplots.
> Erich> Could the developers consider adding this feature?
> The first thing I'd want is quantile() with weights --- which I
> personally find quite interesting and have wanted several times
> in the past --- not wanted enough to implement though.
> I'm interested to hear of (or even see C or R implementations of)
> fast algorithms for "weight quantiles".
> Code contributions are welcome too..
> (And yes, I do know that boxplots are base on "hinges" rather than
> quartiles but that's less interesting here.)
> Martin Maechler <maechler at stat.math.ethz.ch> http://stat.ethz.ch/~maechler/
> Seminar fuer Statistik, ETH-Zentrum LEO C16 Leonhardstr. 27
> ETH (Federal Inst. Technology) 8092 Zurich SWITZERLAND
> phone: +41-44-632-3408 fax: ...-1228 <><
Erich Neuwirth, Didactic Center for Computer Science
University of Vienna
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