Try this:
replace(gsub(".*\\((.*)\\)$", "\\1", tests), !grepl("\\(.*\\)", tests), "")
On Wed, Oct 13, 2010 at 3:16 PM, Bart Joosen <bartjoo...@hotmail.com> wrote:
>
> Hi,
>
> this should be an easy one, but I can't figure it out.
> I have a vector of tests, with their units between brackets (if they have
> units).
> eg tests <- c("pH", "Assay (%)", "Impurity A(%)", "content (mg/ml)")
>
> Now I would like to hava a function where I use a test as input, and which
> returns the units
> like:
> f <- function (x) sub("\\)", "", sub("\\(", "",sub("[[:alnum:]]+","",x)))
> this should give "", "%", "%", "mg/ml", but it doesn't do the job quit
> well.
>
> After searching in the manual, and on the help lists, I cant find the
> answer.
>
> anyone?
>
> Bart
> --
> View this message in context:
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>
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--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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