[R] grep searching for sequence of 3 consecutive upper case letters

[David Barron]

Try

str[grep('[[:upper:]]{3}',str)]


On 06/11/06, Lapointe, Pierre <Pierre.Lapointe at nbf.ca> wrote:
> Hello,
>
> I need to identify all elements which have a sequence of 3 consecutive upper
> case letters, anywhere in the string.
>
> I tested my grep expression on this site: http://regexlib.com/RETester.aspx
>
> But when I try it in R, it does not filter anything.
>
> str <-c("AGH", "this WOUld be good", "Not Good at All")
> str[grep('[A-Z]{3}',str)] #looking for a sequence of 3 consecutive upper
> case letters
>
> [1] "AGH"                "this WOUld be good" "Not Good at All"
>
> Any idea?
>
> Pierre
>
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-- 
=================================
David Barron
Said Business School
University of Oxford
Park End Street
Oxford OX1 1HP