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Message-ID: <CA+SNM80D7vsHr8bN6ePdWzwmWh9JssOmRnUVTckw2sH5PKb46Q@mail.gmail.com> Date: 2011-11-29T07:20:28Z From: Katrina Bennett Subject: Sum matrix by rows, conditional on value In-Reply-To: <E409CA1B-0FB2-4650-9EA4-659CA97012A0@comcast.net> An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20111128/f63533ce/attachment.pl>