interaction plots within trellis

[Olivier Renaud <Olivier.Renaud@pse.unige.ch>]

Hi,

Is it easy with S+ to have side by side several interaction plots between two 
factors, given the value of a 3rd factor (e.g. with trellis) ? In R, a slight 
modification of an example of bwplot help file does the trick (see below), but 
can it be transformed for S+?

Olivier

In R:

 library(lattice)
 data(OrchardSprays)
 bwplot(decrease ~ treatment|I(rowpos<5), OrchardSprays, groups = rowpos,
       panel = "panel.superpose",
       panel.groups = "panel.linejoin",
       xlab = "treatment",
        key = list(lines = Rows(trellis.par.get("superpose.line"),
                  c(1:7, 1)), 
                   text = list(lab = as.character(unique(OrchardSprays$rowpos)),
                  columns = 4, title = "Row position")))


Sincerely,
Olivier Renaud

Olivier.Renaud@pse.unige.ch            http://www.unige.ch/~renaud/ 
Methodology and Data Analysis - Faculty of Psychology and Education      
University of Geneva  -  40, Bd du Pont d'Arve  -  CH-1211 Geneva 4