How can I use
geom_text to add percentage labels on top of each bar in
ggplot2? I know there are several similar questions which are already answered. But they either use only 1 categorical variable or compute the percentages before plotting.
I have following plot:
ggplot(data = mtcars)+ geom_bar(aes(x = factor(cyl), y = (..count..)/sum(..count..)*100, fill = factor(gear)), position = "dodge")
Now I want to add the percentage labels on the top. If I use
y = (..count..)/sum(..count..)*100 in
geom_text, it says
Error in eval(expr, envir, enclos) : object 'count' not found.
It's easiest to calculate the quantities you need beforehand, outside of ggplot, as it's hard to track what ggplot calculates and where those quantities are stored and available.
First, summarize your data:
Save that if you like, or pipe directly into ggplot:
If you really want to keep it all internal to ggplot, you can use
stat = 'count'(or
geom = "text", if you prefer):
which plots exactly the same thing.