[R] Odp: help wth boxplots

Petr PIKAL petr.pikal at precheza.cz
Tue May 26 16:11:38 CEST 2009

r-help-bounces at r-project.org napsal dne 26.05.2009 15:34:25:

> Hi
> I have a vector of data lets call zz (40 values from 4 samples)

Are you sure it is a vector? Your indexing suggest data frame or matrix.

> the data is already in groups, i can even split up the samples using
> SampA <- zz[,2:11]
> SampB <- zz[,12:21]
> SampC <- zz[,22:31]
> SampV <- zz[,32:41]
> I would like an output that gives me 4 boxplots on one plot
> one boxplot for the set of 10 values
> how can i do this in R


boxplot(list(SampA, SampB, SampC, SampV))

but there are more effective ways if you had other data structure


4 column data frame

boxplot(data.frame(rnorm(10), rnorm(10), rnorm(10), rnorm(10)))

or list

boxplot(list(rnorm(10), rnorm(10), rnorm(10), rnorm(10)))
or even a vector of indices for different groups

boxplot(split(rnorm(40), rep(letters[1:4],10)) 


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