This is an interesting discussion on barchart (without error bars) http://www.decisionsciencenews.com/2010/08/11/which-chart-is-better/ Dieter -- View this message in context: http://r.789695.n4.nabble.com/Error-bars-in-lattice-barchart-with-groups-tp3065864p3066860.html Sent from the R help mailing list archive at Nabble.com.