Hi All,

I'm trying to plot boxplot graph. I tried barchart with "groups=" option and
it worked fine. But when I try to generate same kind of graph using
bwplot(), "groups=" option doesn't seem to work. Though this works,

yield ~ variety | site * year

I'm thinking why "groups=" doesn't work in this case, can anyone help
please...

#Code:
library(lattice)
barchart(yield ~ variety | site, data = barley,
         groups = year, layout = c(1,6),
 auto.key = list(points = FALSE, rectangles = TRUE, space = "right"))

bwplot(yield ~ variety | site, data = barley,
         groups = year, layout = c(6,1), scales=(x=list(rot=45)),
 auto.key = list(points = FALSE, rectangles = TRUE, space = "right"))

Thanks,

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