Raw Message

Message-ID: <AANLkTikE8wVyY7T-kskve-RNvFIAOVaVXwzdjSScalEH@mail.gmail.com>
Date: 2010-06-02T16:43:11Z
From: William Rogers
Subject: lapply or data.table to find a unit's previous transaction

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <https://stat.ethz.ch/pipermail/r-sig-hpc/attachments/20100602/b6aeb738/attachment.pl>