What's the range of data you are trying to plot? The error message is pretty clear: you've selected a set of breaks which don't span the data range. Maybe try breaks = c(min(x),seq(4,30,2),max(x)) -- View this message in context: http://r.789695.n4.nabble.com/Hey-guys-I-have-one-slight-problem-with-my-code-tp4678840p4678877.html Sent from the R help mailing list archive at Nabble.com.