On Thu, Jul 17, 2008 at 5:13 PM, Mohammad Ehsanul Karim <wildscop at yahoo.com> wrote: > Dear List, > > Say, we generate data like this- > > dat<-rnorm(1000,1,2) > hist(dat) library(ggplot) qplot(dat, geom="histogram", colour = factor(dat < 0)) Hadley -- http://had.co.nz/