[R] keep empty subsets using aggregate

[David Winsemius]

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