ggplot2: Adding points to a density plot

31 Mar 2010

      Hi,

Consider something like
...
library(ggplot2)
movies$decade <- round_any(movies$year, 10)
m <- qplot(rating,data=movies,colour=factor(decade),geom="density")
m
(modified from "?stat_density").
...
m + geom_point
I'd like to add on the line y=0 a dot for the median of each "decade" 
category (using the same colour coding as the "fill"). I'm failing miserably 
at all my
based approaches and would appreciate if someone could show me the ggplot2 
way of achieving this.

Thanks, Joh

Johannes Graumann

Johannes Graumann

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