On 10.10.2011 18:10, Alexander Engelhardt wrote:
Hey list, This might be a more general question and not that R-specific. Sorry for that. I'm trying to draw a random vector of 4 numbers that sum up to 1. My first approach was something like a <- runif(1) b <- runif(1, max=1-a) c <- runif(1, max=1-a-b) d <- 1-a-b-c but this kind of distorts the results, right? Would the following be a good approach? w <- sample(1:100, 4, replace=TRUE) w <- w/sum(w)
Yes, although better combine both ways to w <- runif(4) w <- w / sum(w) Uwe Ligges
I'd prefer a general algorithm-kind of answer to a specific R function (if there is any). Although a function name would help too, if I can sourcedive.
Thanks in advance, Alex ______________________________________________ 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.
______________________________________________ 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.
