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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.
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A jitter plot represents data points in the form of single dots, in a similar manner to a scatter plot. The difference is that the jitter plot helps visualize the relationship between a measurement variable and a categorical variable.
The use of jitter is a great technique in dot plots, box plots with dots, and scatter plots. Jitter is a random value (or for our purposes pseudo-random) that is assigned to the dots to separate them so that they aren't plotted directly on top of each other.
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') 
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