[R] Aggregate?

[Ingmar Visser]

It does that for me without errors ...
(R 2.3.1 on Mac OSX 10.4.8)
Best, Ingmar


> From: Gustaf Rydevik <gustaf.rydevik at gmail.com>
> Date: Fri, 8 Dec 2006 12:58:01 +0300
> To: <r-help at stat.math.ethz.ch>
> Subject: [R] Aggregate?
> 
> Hi All,
> 
> I think i'm failing to undersatnd how aggregate() is supposed to work.
> 
> example:
> 
>  test1<-sample(c(0,1),100,replace=T)
> test2<-sample(letters,100,replace=T)
> aggregate(test1,list(test2),sum)
> Error in data.frame(w, lapply(y, unlist, use.names = FALSE)) :
>         arguments imply differing number of rows: 26, 0
> 
> I thought this would give me a list containing the number of ones that
> "belong" to each letter. What am I doing wrong?
> 
> Thanks in advance,
> 
> Gustaf
> 
> -- 
> email:gustaf.rydevik at gmail.com
> tel: +46(0)703051451
> address: Kantorsgatan 50:190 75424 Uppsala Sweden
> 
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