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Message-ID: <OF8437A6C0.43D8E2A6-ON88257559.007BD0F3-88257559.007D5242@epamail.epa.gov> Date: 2009-02-10T22:48:57Z From: Seeliger.Curt at epamail.epa.gov Subject: aggregate taking way too long to count. An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20090210/850c4109/attachment-0001.pl>