[R] regular expression submatch?

[David Winsemius]

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"

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David Winsemius, MD
Heritage Laboratories
West Hartford, CT