[R] regular expression submatch?

David Winsemius
Mon, 01 Feb 2010 19:06:34 -0000

On Feb 1, 2010, at 1:57 PM, sjaffe wrote:

>
> What is the simplest way to extract a matched subexpression?
>
> Eg. in perl you can do
>
> "hello world" =~ m/hello (.*)/
>
> which would return 1(true) and set $1 to the matched subexpression
> "world".

If you wanted a logical value returned, then
?grep

If you want the matched subexpression, use , value=TRUE.

??"regular expressions"

>
> --
> View this message in context:
http://n4.nabble.com/regular-expression-submatch-tp1459146p1459146.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at 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.

David Winsemius, MD
Heritage Laboratories
West Hartford, CT