Another option could be:

df$var3 <- gsub(".*\\((.*)\\).*", "\\1", df$var2)

On Wed, Jul 14, 2010 at 3:21 PM, karena <dr.jzhou@gmail.com> wrote:

>
> Hi,
>
> I have a data.frame as following:
> var1         var2
> 1           ab_c_(ok)
> 2           okf789(db)_c
> 3           jojfiod(90).gt
> 4           "ij"_(78)__op
> 5           (iojfodjfo)_ab
>
> what I want is to create a new variable called "var3". the value of var3 is
> the content in the Parentheses. so var3 would be:
> var3
> ok
> db
> 90
> 78
> iojfodjfo
>
> how to do this?
>
> thanks,
>
> karena
> --
> View this message in context:
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> Sent from the R help mailing list archive at Nabble.com.
>
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>



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

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