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 <johannes_graum...@web.de > wrote: > 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 colour coding as the "fill"). I'm failing > miserably > at all my > > m + geom_point > based approaches and would appreciate if someone could show me the ggplot2 > way of achieving this. > > Thanks, Joh > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
