How to fill histogram with color gradient?

Question

I have a simple problem. How to plot histogram with ggplot2 with fixed binwidth and filled with rainbow colors (or any other palette)?

Let

Answer 1

If you really want the number of bins flexible, here is my little workaround:

library(ggplot2)

gg_b <- ggplot_build(
  ggplot() + geom_histogram(aes(x = myData), binwidth=.1)
)

nu_bins <- dim(gg_b$data[[1]])[1]

ggplot() + geom_histogram(aes(x = myData), binwidth=.1, fill = rainbow(nu_bins))