R help - Nov 2009 - keep empty subsets using aggregate

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)

 

 

Thanks in advance,

 

Betty

 

 

 


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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