I am trying to visualise the proportion of two factors (i.e the counts) w.r.t to a binning over a continuous variable. A small running example is the following.
df <- data.frame(s=as.factor(c("0","1","1","0","1","0","0")),
density=c(1.1,1.3,1.4,2.1,2.3,2.2,2.4),
n=as.factor(c("A","A","A","A","A","A","A")))
ggplot(df, aes(x = density, fill = s)) +
geom_histogram(position = "stack", bins = 2) +
facet_wrap("n", scales = "free")
resulting in the following plot:
Now what I would like is that, instead of absolute counts, I get percentages on the y axis, where 100% is the total number of records, and the the filling indicates how many percent are covered by factor level 0 and how many by factor level 1.
