From maechler at stat.math.ethz.ch  Tue Aug 23 15:06:34 2005
From: maechler at stat.math.ethz.ch (Martin Maechler)
Date: Tue, 23 Aug 2005 15:06:34 +0200
Subject: [Rd] weigths in boxplot
In-Reply-To: <4308B108.7030003@univie.ac.at>
References: <20050808192734.F0418A274@slim.kubism.ku.dk>
	<4308B108.7030003@univie.ac.at>
Message-ID: <17163.8026.69287.789426@stat.math.ethz.ch>

>>>>> "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			<><



[Rd] weigths in boxplot
Martin Maechler