Message-ID: <22887127.post@talk.nabble.com>
Date: 2009-04-04T19:42:39Z
From: AllenL
Subject: Help with "by"
Searched for "by" in forums and no hits, should be simple problem.
This is my line:
>bio.mean<-by(Data,Plot, function(x) mean(AbvBioAnnProd))
I want to calculate the mean of "AbvBioAnnProd" in each Plot. What am I
doing wrong?
Thanks in advance,
-AL
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