weigths in boxplot
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 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
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Erich Neuwirth, Didactic Center for Computer Science University of Vienna Visit our SunSITE at http://sunsite.univie.ac.at Phone: +43-1-4277-39902 Fax: +43-1-4277-9399