Of course they are random. But they can't all be randomly picked from [0,1). By scaling them, one is effectively scaling the interval from which they are picked.
B. Nb: the scaling procedure will work for any probability distribution. On Nov 22, 2014, at 10:54 AM, Ranjan Maitra <maitra.mbox.igno...@inbox.com> wrote: > I don't understand this discussion at all. > > n random numbers constrained to have sum <=1 are still random. They are not > all independent. > > That said, the original poster's question is ill=formed since there can be > multiple distributions these random numbers come from. > > best wishes, > Ranjan > > > > On Sat, 22 Nov 2014 10:29:18 -0500 Boris Steipe <boris.ste...@utoronto.ca> > wrote: > >> These are contradictory requirements: either you have n random numbers from >> the interval [0,1), then you can't guarantee anything about their sum except >> that it will be in [0,n). Or you constrain the sum, then your random numbers >> cannot be random in [0,1). You could possibly scale the random numbers: >> n <- 13 >> x <- runif(n) >> x <- x / sum(x) >> x; sum(x) >> >> This will guarantee that their sum is 1 (to numerical accuracy), but your >> numbers are then effectively drawn from the interval [0,2/n) for large n. >> >> B. >> >> >> On Nov 22, 2014, at 9:29 AM, Ragia Ibrahim <ragi...@hotmail.com> wrote: >> >>> >>> Dear all, >>> I use R 3.1.1 for Windows. >>> kindly how can I generate n number of random numbers with probability from >>> [0,1] >>> and their sum must not be more than one >>> thanks in advance >>> Ragia >>> >>> >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> 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. >> > > > -- > Important Notice: This mailbox is ignored: e-mails are set to be deleted on > receipt. Please respond to the mailing list if appropriate. For those needing > to send personal or professional e-mail, please use appropriate addresses. > > ____________________________________________________________ > FREE ONLINE PHOTOSHARING - Share your photos online with your friends and > family! > Visit http://www.inbox.com/photosharing to find out more! > > ______________________________________________ > 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.
