I have made box-plots for the onset values of three different groups using the box-plot function in R like so:
boxplot(onset ~ group, data = pulse.dat, range = 0, col = "lightblue")
Under boxplot pars...
d <- rnorm(1:100, 100, 10) boxplot(d, whisklty = 0, staplelty = 0)
whisklty gets rid of the lines or whiskers
staplelty gets rid of the ends or staples