[R] ordering boxplots according to median

Andrew Robinson A.Robinson at ms.unimelb.edu.au
Wed Mar 22 10:19:27 CET 2006


use the "at=" argument, and feed it the rank of the medians


boxplot(iris$Sepal.Width ~ iris$Species)  #  Not ordered
boxplot(iris$Sepal.Width ~ iris$Species,
    at=rank(tapply(iris$Sepal.Width, iris$Species, median))) # Ordered

I hope that this helps,


On Wed, Mar 22, 2006 at 09:59:09AM +0100, Talloen, Willem [PRDBE] wrote:
> Dear R-users,
> Does anyone knows how I can order my serie of boxplots from lowest to
> highest median (which is much better for visualization purposes).
> thanks in advance,
> willem
> 	[[alternative HTML version deleted]]
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Andrew Robinson  
Department of Mathematics and Statistics            Tel: +61-3-8344-9763
University of Melbourne, VIC 3010 Australia         Fax: +61-3-8344-4599
Email: a.robinson at ms.unimelb.edu.au         http://www.ms.unimelb.edu.au

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