attach(mtcars)
boxplot(mpg~cyl, horizontal = F, main = "", xlab = "cylinder", ylab = "miles per gallon",
pars = list(boxcol = "white", medlty = "blank", medpch=16, medcex = 1.3,
whisklty = c(1, 1), staplelty = "blank", outcex = 0.5), axes = FALSE)