And now I just wonder why the ' bty='n' ' won't work? I did dotplot(BATCH~RESPONSE,data=d,subset=Type=='SHORT',bty='n') and tried other bty parameters, none is working Casper -- View this message in context: http://r.789695.n4.nabble.com/dot-plot-by-group-tp2990469p2990500.html Sent from the R help mailing list archive at Nabble.com.