?sample
efficient enough?> system.time(z <- sample(1:5, 500000, TRUE,
prob=c(.05,.05,.05,.05,.8)))
user system elapsed
0.12 0.02 0.14
> table(z)
z
1 2 3 4 5
24800 24771 25039 25022 400368
>
On Sat, Sep 20, 2008 at 3:43 PM, John Sorkin <[EMAIL PROTECTED]>wrote:
> R 2.6
> Windows XP
>
> I need to select from the integers 1,2,3,4,5 with some pre-determined
> probability, e.g. probability of selecting 5 80%, probability of selecting 1
> or 2 or 3 or 4 20%. Any suggestions for how I might accomplish this? I
> need to do it very efficiently as I will be doing it 500,000 times.
> Thanks
> John
>
> John David Sorkin M.D., Ph.D.
> Chief, Biostatistics and Informatics
> University of Maryland School of Medicine Division of Gerontology
> Baltimore VA Medical Center
> 10 North Greene Street
> GRECC (BT/18/GR)
> Baltimore, MD 21201-1524
> (Phone) 410-605-7119
> (Fax) 410-605-7913 (Please call phone number above prior to faxing)
>
> Confidentiality Statement:
> This email message, including any attachments, is for ...{{dropped:22}}
______________________________________________
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.
