r - Remove whiskers in box-whisker-plot

Question

Is there a straightforward way to remove the whiskers from a box-whisker-plot in ggplot2 in R? I'd like to keep only the boxes themselves.

MWE:

library("ggplot2")
p <- ggplot(mtcars, aes(factor(cyl), mpg))
p + geom_boxplot(outlier.size = 0)

Answer 1

We only need to add the argument coef = 0:

library(ggplot2)
p <- ggplot(mtcars, aes(factor(cyl), mpg))
p + geom_boxplot(outlier.shape = NA, coef = 0) # Or outlier.size = -1 instead of outlier.shape = NA