a <- c( 20071031,20071130, 20071231)
sort(a)

Or if you want convert to date:
sort(strptime(a, '%Y%m%d'))

On Mon, Aug 2, 2010 at 9:03 PM, Leigh E. Lommen <
leigh.lommen@courtesycorporation.com> wrote:

> I am unsure how to sort a column by date if it is currently in the form:
>
> YYYYMMDD
>
>
>
> For example the months:
>
> 20071031
>
> 20071130
>
> 20071231
>
> Etc.
>
>
>
> Regards,
>
> Leigh
>
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>



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

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