Re: [Rd] weigths in boxplot

From: Erich Neuwirth <erich.neuwirth_at_univie.ac.at>
Date: Thu 25 Aug 2005 - 21:35:45 GMT

Martin,

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 it works.

Erich

Martin Maechler wrote:

>>>>>>"Erich" == Erich Neuwirth <erich.neuwirth@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
Visit our SunSITE at http://sunsite.univie.ac.at
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Received on Fri Aug 26 07:42:13 2005

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