[R] Violin plot for discrete variables.
Martin Maechler
maechler at stat.math.ethz.ch
Mon Mar 21 18:08:58 CET 2005
>>>>> "AndyL" == Liaw, Andy <andy_liaw at merck.com>
>>>>> on Mon, 21 Mar 2005 08:14:20 -0500 writes:
AndyL> I'd suggest dotcharts, such as:
AndyL> x1 <- sample(letters[1:4], 100, replace=TRUE, prob=c(.2, .3, .4, .1))
AndyL> x2 <- sample(letters[1:4], 100, replace=TRUE, prob=c(.1, .4, .3, .2))
AndyL> f1 <- table(x1) / length(x1)
AndyL> f2 <- table(x2) / length(x2)
AndyL> lev <- factor(c(names(f1), names(f2)))
AndyL> require(lattice)
AndyL> dotplot(lev ~ c(f1, f2), groups=rep(1:2, c(length(f1), length(f2))),
AndyL> panel=panel.superpose)
yes. Maybe slightly even more useful --- and closer to the
plot(table(.)), ...) that Witold mentioned would be the
following slight variation:
dotplot(lev ~ c(f1, f2), groups=rep(1:2, c(length(f1), length(f2))),
panel=panel.superpose, type =c("p","h"))
Note the nice lattice feature (thanks to Deepayan Sarkar!) of
allowing type to be a union of two basic types.
Martin
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