Partially color histogram in R

Question

I have a histogram as shown in the picture. I want the bars in the two regions

Answer 1

Here's the method I mentioned in comments:

Make some test data (you should do this in your question!)

test = runif(10000,-2,0)

get R to compute the histogram but not plot it:

h = hist(test, breaks=100,plot=FALSE)

Your histogram is divided into three parts:

ccat = cut(h$breaks, c(-Inf, -0.6, -0.4, Inf))

plot with this palette, implicit conversion of factor to number indexes the palette:

plot(h, col=c("white","green","red")[ccat])

ggplot2 solutions are also available.