On Tue, Oct 29, 2013 at 1:13 PM, Lopez, Dan <[email protected]> wrote:
> grep("^([a-z]+) +\1 +[a-z]+ [0-9]",lines)
Your expression has a typo:
R> grep("^([a-z]+) +\\1 +[a-z]+ [0-9]",lines)
[1] 2
--
Sarah Goslee
http://www.functionaldiversity.org
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