calpeda wrote:
> hi
> I ve a list of item x = ( "xxxxx1"
> "xxxxx2"
> "yyyyx3")
>
> I need to extract a new vector y = ( "xxxx",
> "xxxx",
> "yyyy"
> )
> I mean, for each item I need to extract the first 4 digit
> How is that possible?
>
sub('^(\\d{4}).*', '\\1', x, perl=TRUE)
vQ
______________________________________________
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.
