Message-ID: <1314734416046-3779622.post@n4.nabble.com>
Date: 2011-08-30T20:00:16Z
From: amalka
Subject: help with "by" command
In-Reply-To: <CABqBGVd9WF=WRq8MBsQ9ykP6GUJT-eroh_BRthzU9vB38MAR0w@mail.gmail.com>
Thanks very much for the help.
I ended up getting it to work with one small change:
by(foo, foo$V2, function(foo) mean(foo$trust, na.rm=T))
thanks again,
Ari
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