Message-ID: <1292436605306-3089556.post@n4.nabble.com>
Date: 2010-12-15T18:10:05Z
From: Vassilis
Subject: Can the by() function return a single column?
In-Reply-To: <Pine.SOC.4.64.1012151718320.20652@solcom.hrz.uni-giessen.de>
Hi Gerrit,
This does exactly what I want, thank you very much!
Even more, I notice that ave() uses the split/unsplit functions under the
hood, which are very useful tools as they allow to apply even more
complicated functions on a factor-by-factor basis.
best,
Vassilis
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