On Nov 24, 2009, at 5:03 PM, Fang (Betty) Yang wrote:
Dear all,
I am struggling with a small problem. By using aggregate, the empty
subsets
are removed. I need each empty subset to be 0. Any suggestions will be
appreciated.
Code:
edref = aggregate(rep(1,times=dim(eds)[1]),list(eds[,11], eds[,7],
eds[,27]), sum)
That's the code, but where is the sample data?:
E.g.:
dput(eds)
Or:
dput( head(eds, 30) )
Or:
dump("eds", stdout() )
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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