Question

Is there any way in R to do a stacked area plot where the outcome is not proportions but absolute values, i.e. the slices should not add up to 1, but should represent the actual values of each factor?

Answer 1

An example using ggplot:

library(ggplot2)
library(reshape2)

dat <- data.frame(
    x = LETTERS[1:3],
    series1 = 1:3,
    series2 = 4:6)

ggplot(melt(dat), aes(x=x, y=value, fill=variable, group=variable)) + geom_area()