Hi all, first of all thanks for the answer to my previous question on lattice some time ago. In particular to Patrick Connolly for advices on netiquette (I hope this time I'm doing right....) and to Deepayan Sarkar fro the help on lattice.
Now, my nowaday problem. Please consider the following mydf<-cbind.data.frame( RESPONSE = c(rnorm(9,rep(2:4,each=3),10), rnorm(9,rep(7:9,each=3),10), rnorm(9,rep(5:7,each=3),10), rnorm(9,rep(9:11,each=3),10) ), STD = c(rep("Std.Ext",18), rep("Std.Int",18)), METHOD = rep(c("A","B"),2, each=9), VIAL = rep(paste("Vial",rep(1:3, each=3)),4)) library(lattice) my.theme<-list(background=list(col=0), strip.background=list(col="transparent"), box.dot=list(cex=0.1, col=1), box.umbrella=list(col=1,lty=1), box.rectangle=list(col= 1)) lset(my.theme) bwplot(paste(METHOD,VIAL)~RESPONSE|STD, data=mydf) as a (fictitious) experiment on a determination of a substance in 3 vials, which was quantified with an external (or internal) standard, with two different methods (A or B) with 3 injections per vial (replicates) I would like to stress the difference between A and B (Method) in the bwplot, so I imagine I could distantiate the boxplots, or colour them according to the "Method". How can I add a blank line between "A Vial 3" and "B Vial 1"? Or how can I change the colour of the boxplots? (say the three lower ones in black, and the rest red) Thanks Ottorino-Luca Pantani, Università di Firenze Dip. Scienza del Suolo e Nutrizione della Pianta P.zle Cascine 28 50144 Firenze Italia Tel 39 055 3288 384 Fax 39 055 333 273 [EMAIL PROTECTED] http://www.unifi.it/dssnp/ ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html