I noticed the following: the 2 datasets rep(c(0,1,2),c(10,20,40)) and rep(c(0,1,2),c(10,40,20)) produce identical boxplots despite the fact that the medians are different. The reason is that the median in one case coincides with the first quartile, and in the second case with the third quartile. Is there a recommended way of displaying the median visibly in these cases? Setting notch=TRUE displays the median, but does look strange.
boxplot in extreme cases
1 message · Erich Neuwirth