Hi all, I am trying to do this type of graph (code taken from the example of xYplot help). dfr <- expand.grid(month=1:12, continent=c('Europe','USA'), sex=c('female','male')) set.seed(1) dfr <- upData(dfr, y=month/10 + 1*(sex=='female') + 2*(continent=='Europe') + runif(48,-.15,.15), lower=y - runif(48,.05,.15), upper=y + runif(48,.05,.15)) xYplot(Cbind(y,lower,upper) ~ month,groups=sex, subset=continent=='Europe', data=dfr) But I would like to have a small shifting between the the groups in order to avoid overlapping, the problem is I have to do it in lattice. I looked throught the options but I did not found my solution. Best Regards, Guillaume Le Ray [[alternative HTML version deleted]]