R help - Apr 2009 - Lattice plot with an extra strip showing group weights

Dear r-help,

How can I add a strip to show group weights using lattice package? For
example, in the following code, I'd like to using "wt" variable in
a  trip
to demonstrate the relative size of groups.

(Following is just the simplest form to demonstrate the question. A
conditional variable will be added to the bwplot in real problems).

#####################################
 library(lattice)

# generate data
x1 <- cbind(rnorm(50,1,1),rnorm(50,10,1),1)
x2 <- cbind(rnorm(50,2,1),rnorm(50,20,1),2)
x  <- as.data.frame(rbind(x1,x2))
names(x) <- c("x","wt","group")
# plot
bwplot(x ~ group, data=x,horizontal=FALSE)
######################################

Thanks in advance for this great R group!

Regards,
Marvel1812

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