[R] case insensitive regular expression

From: JeeBee <JeeBee_at_troefpunt.nl>
Date: Mon 05 Jun 2006 - 23:16:34 EST

Can anybody fix the following, to match a string disregarding case?

I tried:
with(my.data.frame, regexpr(pattern = '(?i)J\. Test',   text=TARGET_COLUMN), perl=T) != -1)

R yields: invalid regular expression

with(my.data.frame, regexpr(pattern = 'J\. Test',   text=TARGET_COLUMN), perl=T) != -1)
works, but it does not match "J. TEST".
It does match "J. Test" correctly.

I have the feeling I'm not reading the documentation good enough, but cannot seem to figure this out, sorry.

Thanks in advance,

R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Mon Jun 05 23:30:08 2006

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