Violin Plot (geom_violin) with aggregated values

Question

I would like to create violin plots with aggregated data. My data has a category, a value coloumn and a count coloumn:

data <- data.frame(category = rep(LE         


        

Answer 1

Using stat="identity" and specifying a violinwidth aesthetic appears to work,although I had to put in a fudge factor:

ggplot(data, aes(x = category, y = value)) + 
   geom_violin(stat="identity",aes(violinwidth=0.2*count))

Answer 2

You can submit a weight when calculating the areas.

plot2 <- ggplot(data, aes(x = category, y = value, weight = count)) + geom_violin()
plot2

You will get warning messages that the weights do not add to one, but that is ok. See here for similar/related discussion.