Hi guys, I have a tricky problem that I'd appreciate your help with. I have two categorical variables, say varA and varB and an associated frequency Freq for combinations of the levels of varA and varB. This was created with a table() call. I'd now like to make panel plots of the frequency. I can do a panel plot by varA: barchart(data$Freq ~ data$varB | data$varA) How do I achieve two levels of nesting for say a third categorical variable varC? That is, how do I specify 2 'given's in the the panel plot, and preferably arranged the panels vertically within the 'inner' panel/ thanks very much, Richie [[alternative HTML version deleted]]