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Message-ID: <a835c81e1001181429t2b96182eu36c7cb03fe4e1aba@mail.gmail.com> Date: 2010-01-18T22:29:25Z From: zhijie zhang Subject: problem of data manipulation In-Reply-To: <77EB52C6DD32BA4D87471DCD70C8D70002618802@NA-PA-VBE03.na.tibco.com> An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20100118/088d0248/attachment.pl>