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Message-ID: <CAHmzXO4J9AOQGJNxYPfmWU=nLDzdFHXaghL91oGFxg=XOBfVXA@mail.gmail.com> Date: 2013-12-13T21:38:40Z From: Gang Chen Subject: dataframe manipulation In-Reply-To: <CAM_vjumLQCrrnDo_1D+QS0mc4vPZW5oW7O5S2i1Zn=W3GKs3Wg@mail.gmail.com> An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20131213/c5921981/attachment.pl>