"S.Q. WEN" <[EMAIL PROTECTED]> writes: > Hi, > I want to get random number which is uniformly distributed on the unit > disc. > How can I do that with R?
Most easily, although perhaps not most efficiently, by using spherical coordinates: N <- 10000 r <- sqrt(runif(N)) theta <- runif(N,0,2*pi) x <- r*cos(theta) y <- r*sin(theta) plot(x,y,pch=".") -- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ R-help@stat.math.ethz.ch 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.
