Show frequencies along with barplot in ggplot2

geom_text is tha analog of text from base graphics:

p + geom_bar() + stat_bin(aes(label=..count..), vjust=0, 
                          geom="text", position="identity")

If you want to adjust the y-position of the labels, you can use the y= aesthetic within stat_bin: for example, y=..count..+1 will put the label one unit above the bar.

The above also works if you use geom_text and stat="bin" inside.

A hard way to do it. I'm sure there are better approaches.

ggplot(mtcars,aes(factor(cyl))) + 
geom_bar() + 
geom_text(aes(y=sapply(cyl,function(x) 1+table(cyl)[names(table(cyl))==x]),
label=sapply(cyl,function(x) table(cyl)[names(table(cyl))==x])))

When wanting to add different info the following works:

ggplot(mydata, aes(x=clusterSize, y=occurence)) +
geom_bar() + geom_text(aes(x=clusterSize, y=occurence, label = mydata$otherinfo))