Color Barplot by Count

Question

I am creating a barplot in R and want to color each bar by bar height (count)

Currently what I have:

z=rnorm(n,1)
Z=runif(n)
h=barplot(Z)

I have pictures but not enough reputation to post them. So here is the example in MatLab: MatLab-Color bars by height

Answer 1

In addition to baptiste's ggplot2 solution, here's a simple example using barplot:

Z <- sample(20,15,replace = TRUE)
barplot(Z,col = heat.colors(max(Z))[Z])

which produces something like this: