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Message-ID: <CAO81HcQGEVggibq2j4fHz7RoFu25dKe91Co=e97-fD5ctrYG2w@mail.gmail.com>
Date: 2012-11-15T11:19:24Z
From: David Romano
Subject: using ifelse to remove NA's from specific columns of a data frame containing strings and numbers

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