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Message-ID: <CADgEnD=pXF_XH6fay4=+R6Aj6M996OAPLz8b_iuEr=G-qnDYYA@mail.gmail.com>
Date: 2012-07-24T06:40:56Z
From: Raghuraman Ramachandran
Subject: Collapsing a vector/data-frame based on the previous values

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