Do it with aggregate(), something like this should do:
aggregate(.~cluster, FUN=summary, data=data)
Now if you don't want to run summary(), replace it with the function
you'd like.
HTH,
Ivan
Le 12/13/2010 17:17, effeesse a écrit :
what am I supposed to put into function(x)? The indicator for extracting the
subgroups?
data is the df. cluster={1,...,14}.
This is how I was compiling:
"for (i in 1:14) {
my.summary<-data$cluster==i c(mean(?),var(?))
summary(var_A~cluster, fun=my.summary,data=data)
summary(var_B~cluster, fun=my.summary,data=data)
summary(var_C~cluster, fun=my.summary,data=data)
summary(var_D~cluster, fun=my.summary,data=data)
summary(var_E~cluster, fun=my.summary,data=data)
summary(var_F~cluster, fun=my.summary,data=data)
summary(var_G~cluster, fun=my.summary,data=data)
}"
thanks for your patience.
--
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calan...@uni-hamburg.de
**********
http://www.for771.uni-bonn.de
http://webapp5.rrz.uni-hamburg.de/mammals/eng/1525_8_1.php
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