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Message-ID: <1386526799.96861.YahooMailNeo@web190503.mail.sg3.yahoo.com> Date: 2013-12-08T18:20:31Z From: kingsly Subject: How to evaluate sequence of strings like this In-Reply-To: <1386521991.56294.YahooMailNeo@web142603.mail.bf1.yahoo.com> An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20131208/07a10ed1/attachment.pl>