Hi, a reproducible example would help us to help you. In any case, you might want to consider a for-loop in combination with par(mfrow = c(?, ?)). The lattice or ggplot2 package might also provide a solution to your problem. Cheers, Jannes -- View this message in context: http://r.789695.n4.nabble.com/Nested-boxplot-groups-tp4687818p4687820.html Sent from the R help mailing list archive at Nabble.com.