From: RINNER Heinrich (H.RINNER@TIROL.GV.AT)
Date: Mon 26 Feb 2001 - 21:38:37 EST
Message-ID: <C4D44AB4CB62D311BA6500041202E886264140@xms1.tirol.gv.at>
Dear R-users!
I am using R1.2.0 under Windows NT4.0, and have data of the following form:
> #simple example of data structure:
> x <- data.frame(group=LETTERS[1:3], class1=1:3, class2=4:6)
> x
group class1 class2
1 A 1 4
2 B 2 5
3 C 3 6
I would like to convert this to a data.frame y of the following form:
> y
group class counts
1 A class1 1
2 A class2 4
3 B class1 2
4 B class2 5
5 C class1 3
6 C class2 6
So what I'm looking for is something like an "untable"-function. Is there a
simple "natural" way for this in R, or will I have to loop through rows and
columns somehow (my "real world" data set consists of 279 rows/groups and
100 columns/classes)?
Heinrich.
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