Raw Message

Message-ID: <BANLkTi=Gn-X23-jS-8AQqbtQ+ggCGjpAjg@mail.gmail.com>
Date: 2011-04-06T20:58:07Z
From: Jorge Ivan Velez
Subject: Getting number of students with zeroes in long format
In-Reply-To: <BANLkTi=011gU89mDsaM_3nCfA7u9grAazw@mail.gmail.com>

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20110406/6972a155/attachment.pl>