[R] boxplot grouped by two variables.
J.C.Rougier at durham.ac.uk
Tue Nov 21 18:10:51 CET 2000
On Tue, 21 Nov 2000, Vadik Kutsyy wrote:
> Is there a quick way to make boxplots groups by two variables? By that
> I mean, that if x axes have values ("A","B","C"), than at each value
> there would be a few boxplots each for a value of second variable (say
If I understand you correctly you want to try the "interaction" function
in a boxplot. Your data needs to be organised into a data.frame with
appropriate factors. Here's a simple example ...
boxplot(breaks~interaction(wool, tension), data=warpbreaks, col=2:3)
Hope this helps, Jonathan.
Jonathan Rougier Science Laboratories
Department of Mathematical Sciences South Road
University of Durham Durham DH1 3LE
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