Delete comment from: One R Tip A Day
Paolo said...
Dear Yoonjeong,
Not a solution, but a starting point:
library(ggplot2)
ggplot()+ geom_density(aes(x=y1), colour="red", fill="red", alpha=0.3) + geom_density(aes(x=y2), colour="blue", fill="blue", alpha=0.3)
HIH!
Aug 16, 2013, 11:14:38 PM