Re: [R] ggplot2: Adding points to a density plot

Thanks a lot! This got me started! Joh Dennis Murphy wrote: > Hi: > > Try this: > > library(ggplot2) > movmed <- ddply(movies, .(decade), summarise, med = median(rating)) > m + geom_point(data = movmed, aes(x = med), y = 0, size = 2) > > HTH, > Dennis > > On Wed, Mar 31, 2010 at 4:46 AM, Joh

Re: [R] ggplot2: Adding points to a density plot

Hi: Try this: library(ggplot2) movmed <- ddply(movies, .(decade), summarise, med = median(rating)) m + geom_point(data = movmed, aes(x = med), y = 0, size = 2) HTH, Dennis On Wed, Mar 31, 2010 at 4:46 AM, Johannes Graumann wrote: > Hi, > > Consider something like > > library(ggplot2) > > movi

[R] ggplot2: Adding points to a density plot

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"). I'd like to add on the line y=0 a dot for the median of each "decade" category (using the same c