[R] randomly select duplicated entries

[jim holtman]

How about this:

> dat <- read.table(textConnection("Id         myvar
+ 12 1
+ 12 2
+ 12 6
+ 34 9
+ 34 4
+ 34 8
+ 65 15
+ 65 23"), header = TRUE)
> closeAllConnections()
> # split by the id and then choose one
> x <- lapply(split(dat, dat$Id), function(.grp){
+     .grp[sample(seq(length(.grp)), 1),]
+ })
> do.call(rbind, x)
   Id myvar
12 12     1
34 34     9
65 65    15


On Wed, Jul 9, 2008 at 3:17 PM, Juliet Hannah <juliet.hannah at gmail.com> wrote:
> Using this data as an example
>
> dat <- read.table(textConnection("Id         myvar
> 12 1
> 12 2
> 12 6
> 34 9
> 34 4
> 34 8
> 65 15
> 65 23"), header = TRUE)
> closeAllConnections()
>
> how can I create another data set that does not have duplicate entries
> for 'Id', but the included values
> are randomly selected from the available ones.
>
> Thanks!
>
> Juliet
>
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>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?