Thanks！ now it's just a matter of 'superposing' the density onto the barplot I am looking at the example here, but it does not seem to applicable to barplot. casper -- View this message in context: http://r.789695.n4.nabble.com/how-do-i-plot-this-hist-tp3032796p3035110.html Sent from the R help mailing list archive at Nabble.com.