Data manipulation in a data.frame

Thu, Feb 20, 2014 2:54 PM

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Ioanna Ioannou Data manipulation in a data.frame Feb 20 arun Data manipulation in a data.frame Feb 20 arun Data manipulation in a data.frame Feb 20 Bert Gunter Data manipulation in a data.frame Feb 20 Ioanna Ioannou Data manipulation in a data.frame Feb 21 Bert Gunter Data manipulation in a data.frame Feb 21 arun Data manipulation in a data.frame Feb 21 Bert Gunter Data manipulation in a data.frame Feb 21