[R] replace id by running number

[Henrique Dallazuanna]

Try this:

as.numeric(factor(y, levels = unique(y)))


On Sat, Mar 27, 2010 at 12:42 PM, sun <sun.sonny71 at googlemail.com> wrote:
> Dear all,
>
> I want to replace an (unsorted) id variable in a large dataset by a running
> number without changing the order of the cases.
>
> E.g.,
>
> y <- c(4,4,4,2,45,12,12)
>
> should be replaced by something like
>
> x <- c(1,1,1,2,3,4,4)
>
> Sorry for this simple question  & thank you very much for your help!
>
>
>
>
>
>
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>
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>



-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O