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Message-ID: <SNT104-W461DC7CB068BDC0DDDC251B5690@phx.gbl> Date: 2010-01-15T10:03:07Z From: Joel Fürstenberg-Hägg Subject: Remove part of string in colname and calculate mean for columns groups An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20100115/f97c756c/attachment.pl>