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...on: set.seed(138813) n<-100 x<-rnorm(n); y<-rnorm(n) and plotted a scatterplot of it: plot(x,y) Now I'd like to add the 2D-standard deviation. I found a thread regarding plotting arbitrary confidence boundaries from Pascal H?nggi http://www.mail-archive.com/r-help at r-project.org/msg24013.html which cites the even older thread http://tolstoy.newcastle.edu.au/R/help/03b/5384.html As I am unfortunately only a very poor R programmer, the code of Pascal H?nggi is a myth to me and I am not sure whether I was able to translate the recommendation of Brain Ripley in the later thread (which...