[R] how to add frequencies to barplot

[casperyc]

Hi,

I have count data

x2=rep(c(0:3),c(13,80,60,27))

x2
 0  1  2  3 
13 80 60 27

I want to graph to be ploted as 

barplot(table(x2),density=4)

how do I add relative frequency to it, like in

hist(x2,labels=T)

above the 'bar's

Thanks.

casper


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