[R] data frame usage

Julian Burgos jmburgos at u.washington.edu
Thu Oct 25 20:38:08 CEST 2007

Check out the tapply function.


Bernd Jagla wrote:
> Hi, 
> I am new to R and couldn't find any information on how to handle my table
> data that I just read in the way I want to use it..
> I read in a table from a file:
> x <- read.delim("filenam", header=TRUE)
> one column (x$label) hold the class labels. Another holds some values
> (x$val).
> I want to calculate summary statistics for different classes.
> How would I do this?
> Thanks,
> Bernd
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