[R] Re : Re : descriptive statistics

[Ivan Calandra]

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.calandra at uni-hamburg.de

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