[R] How to choose 3 random numbers from 1 up to 9?

[Gavin Simpson]

Ettinger, Nicholas wrote:
> Hello all,
> 
> For the not-so-deeply-mathematically/statistically-literate, what is the
> simplest command with which to choose three "random" numbers from the
> integer list 1 up to 9?

?sample

as in

 > sample(1:9, 3) # your result may vary!
[1] 4 7 1

or, if you need replacement, set argument replacement = TRUE

Also, look at ?set.seed for a way to make sure you get the same set of 
pseudorandom numbers of reproducibility of your work is required.

HTH

G

> 
> After reading the ".Random.seed" help page along with several others, it
> seems like the one simple choice might be:
> 
> round(rnorm(1:3,4.5,1))
> 
> ??
> 
> Any thoughts? Suggestions or better ideas most welcome!
> 
> Thank you.
> --Nick Ettinger
> 
> ______________________________________________
> R-help at 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.


-- 
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
  Dr. Gavin Simpson             [t] +44 (0)20 7679 0522
  ECRC, UCL Geography,          [f] +44 (0)20 7679 0565
  Pearson Building,             [e] gavin.simpsonATNOSPAMucl.ac.uk
  Gower Street, London          [w] http://www.ucl.ac.uk/~ucfagls/
  UK. WC1E 6BT.                 [w] http://www.freshwaters.org.uk
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%