[R] any equivalent SUM IF statement in R

David Winsemius dwinsemius at comcast.net
Sun Nov 22 22:15:11 CET 2009


Presumably you want all the columns _except_ column 1, right?

Perhaps (no code, no test) :

sum( dta[ dta[,1]=="boy , -1 ] )

--  
David.
On Nov 22, 2009, at 3:44 PM, ychu066 wrote:

>
> for example, i want to sum all the row entries if column 1 takes the  
> value
> "boy". anyone knows ?
> -- 
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT




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