How to add boxplots to scatterplot with jitter

r plot lattice
rnso picture rnso · May 15, 2014 · Viewed 65.1k times · Source

I am using following commands to produce a scatterplot with jitter:

ddf = data.frame(NUMS = rnorm(500), GRP = sample(LETTERS[1:5],500,replace=T))
library(lattice)
stripplot(NUMS~GRP,data=ddf, jitter.data=T)

I want to add boxplots over these points (one for every group). I tried searching but I am not able to find code plotting all points (and not just outliers) and with jitter. How can I solve this. Thanks for your help.

Answer

Rich Scriven picture Rich Scriven · May 15, 2014

Here's one way using base graphics.

boxplot(NUMS ~ GRP, data = ddf, lwd = 2, ylab = 'NUMS')
stripchart(NUMS ~ GRP, vertical = TRUE, data = ddf, 
    method = "jitter", add = TRUE, pch = 20, col = 'blue')

enter image description here

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