Message-ID: <4413FB3A.8080503@uwinst.unizh.ch>
Date: 2006-03-12T10:43:06Z
From: Stefanie von Felten, IPW&IfU
Subject: tapply with unequal length of arguments
Hi everyone,
Is it possible to use tapply(x,y,mean) if not all groups of x by y are
of the same length (for example if you have one missing observation)?
I tried tapply(x,y,mean,na.omit=T) but it doesn't work!
Steffi
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Stefanie von Felten
Doktorandin
ETH Z?rich
Institut f?r Pflanzenwissenschaften
ETH Zentrum, LFW A 2
Telefon: 044 632 85 97
Telefax: 044 632 11 53
e-mail: stefanie.vonfelten at ipw.agrl.ethz.ch
http://www.ipw.agrl.ethz.ch/~svfelten/
und:
Universit?t Z?rich
Institut f?r Umweltwissenschaften
Winterthurerstrasse 190
8057 Z?rich
Telefon: 044 635 61 23
Telefax: 044 635 57 11
e-mail: sfelten at uwinst.unizh.ch
http://www.unizh.ch/uwinst/homepages/steffi.html