Try this:

gsub("__.*", "", "1041281__2009_08_20_.lev")

On Fri, Aug 21, 2009 at 4:50 PM, stephen sefick <ssefick@gmail.com> wrote:

> x <- "1041281__2009_08_20_.lev"
>
> I would like to split this string up and only extract the leading numbers.
>
> 1041281
>
> to use as a label for a data column in a bigger for loop function to
> read in data.
> regards,
>
> --
> Stephen Sefick
>
> Let's not spend our time and resources thinking about things that are
> so little or so large that all they really do for us is puff us up and
> make us feel like gods.  We are mammals, and have not exhausted the
> annoying little problems of being mammals.
>
>                                                                -K. Mullis
>
> ______________________________________________
> 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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