Dear all, Anyone knows how to generate a vector of Normal distributed values (for example N(0,0.5)), but with a sum-to-zero constraint??
The sum would be exactly zero, without decimals. I made some attempts: > l <- 1000000 > aux <- rnorm(l,0,0.5) > s <- sum(aux)/l > aux2 <- aux-s > sum(aux2) [1] -0.000000000006131392 > > aux[1]<- -sum(aux[2:l]) > sum(aux) [1] -0.00000000000003530422 but the sum is not exactly zero and not all parameters are N(0,0.5) distributed... Perhaps is obvious but I can't find the way to do it.. Thank you very much! Marc ______________________________________________ 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.
