Message-ID: <CAHrh_MQGS6SbRoXKb3_W55j1t=zEBc3Py50ERGtvY+KdzgEYbA@mail.gmail.com>
Date: 2012-02-24T14:12:48Z
From: Martin
Subject: Improving performance of split-apply problem
In-Reply-To: <CAAmySGOwOUEEwyHfEJ788ehmtNph9ygSJ20taoPLgF8nxnQTvg@mail.gmail.com>
An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20120224/fe136d75/attachment.pl>