[R] randomly select duplicated entries

[Henrique Dallazuanna]

Try this:

do.call(rbind, lapply(split(dat, dat$Id),
                             function(x)x[sample(1:nrow(x), 1),]))

On 7/9/08, 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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-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O