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Message-ID: <CAKL8G3Ex56iESnQSYZu9BzdSkZ=7-AV6mikRoxH2P3uxfGXTug@mail.gmail.com> Date: 2013-03-11T10:57:43Z From: Jorge I Velez Subject: take two columns from a set of lists In-Reply-To: <CAEjRLuR_sMEUj-L026DtR-Hn71yEs7vnMuW+rcw+xdThpFcN6A@mail.gmail.com> An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20130311/bd6295bd/attachment.pl>