r=1:10
u=c("a","a","a","b","b","b","c","d","e","e")
uf = factor(u)
rm = tapply(r, uf, mean)
stripchart(r~u,vertical=TRUE,pch=21)
stripchart(rm~levels(uf),vertical=TRUE,pch=3,add=TRUE)
----------
the above code creates a scatter plot of nominal data
are there alternatives to generate the same or similar
"kind" of figure?
TIA,
Mike