How to add frequency count labels to the bars in a bar graph using ggplot2?

r ggplot2 geom-bar geom-text
Tamer Koksal picture Tamer Koksal · Oct 24, 2014 · Viewed 77.8k times · Source

I want to plot frequency distribution of an [r] factor variable as a bargraph, where bars represent the frequency counts of the factor levels. I use ggplot2 to do that and there's no problem with that.

What I can't figure out is how to add frequency count labels to the bars in the bargraph. The syntax that I've tried is as follows:

ggplot(data, aes(x = factorvar)) + geom_bar(fill = "somecolor") + geom_text(aes(y = ???))

I think I thoroughly searched in stackoverflow and "R Graphics Cookbook" by W.Chang but I couldn't find any specific answer to what parameter should I match to "y" in the aesthetics of geom_text() above. I tried some variants like: (y = ..count..) but it didn't work.

I would appreciate any help. Thanks...

Answer

keegan picture keegan · Oct 24, 2014 
ggplot(data=diamonds, aes(x=clarity)) +
geom_bar() +
geom_text(stat='count', aes(label=..count..), vjust=-1)

enter image description here

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