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I am trying to insert labels into a proportional barchart: one label per segment, with as text the percentage of each segment. With the help of thothal I managed to do this:

var1 <- factor(as.character(c(1,1,2,3,1,4,3,2,3,2,1,4,2,3,2,1,4,3,1,2)))
var2 <- factor(as.character(c(1,4,2,3,4,2,1,2,3,4,2,1,1,3,2,1,2,4,3,2)))
data <- data.frame(var1, var2)


dat <- ddply(data, .(var1), function(.) {
res <- cumsum(prop.table(table(factor(.$var2))))
data.frame(lab = names(res), y = c(res))
})

ggplot(data, aes(x = var1)) + geom_bar(aes(fill = var2), position = 'fill') +
geom_text(aes(label = lab, x = var1, y = y), data = dat)

I would like to have for labels the percentage of each level, and not the level name.

enter image description here

Any help appreciated!

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