Problem subsetting: undefined columns

Fri, Dec 2, 2011 9:01 AM

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Aurélien PHILIPPOT Problem subsetting: undefined columns Dec 1 Paul Hiemstra Problem subsetting: undefined columns Dec 2 jim holtman Problem subsetting: undefined columns Dec 2 Aurélien PHILIPPOT Problem subsetting: undefined columns Dec 2 michael.weylandt at gmail.com (R. Michael Weylandt Problem subsetting: undefined columns Dec 2 Aurélien PHILIPPOT Problem subsetting: undefined columns Dec 2