[R] unexpected behaviour of rnorm()

Bob Wheeler bwheeler at echip.com
Wed Nov 27 14:29:38 CET 2002


rziggurat() does not exhibit this behavior and is quite a
bit faster.


Robin Hankin wrote:
> 
> Hello everyone.
> 
> If I do
> 
> f <- function(n){max(rnorm(n))}
> plot(sapply(rep(5000,4000),f))   #[this takes my PC about 30 seconds]
> 
> then I get something quite unexpected: gaps in the distribution.  For
> me, the most noticable one is at about 3.6.
> 
> Do others get this?  Is it an optical illusion?  It can't be right,
> can it?  Or maybe I just don't understand the good ol' Gaussian very
> well.
> 
> anyone got an explanation?
> 
> [linux redhat 7.1; R-1.6.1]
> 
> --
> 
> Robin Hankin, Lecturer,
> School of Geography and Environmental Science
> Tamaki Campus
> Private Bag 92019 Auckland
> New Zealand
> 
> r.hankin at auckland.ac.nz
> tel 0064-9-373-7599 x6820; FAX 0064-9-373-7042
> 
> as of: Wed Nov 27 09:15:00 NZDT 2002
> This (linux) system up continuously for:  454 days, 14 hours, 57 minutes
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-- 
Bob Wheeler --- (Reply to: bwheeler at echip.com)
        ECHIP, Inc.
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