[R] How to delete rows based on replicate values in one column with some extra calcuation

[Nikhil Kaza]

aggregate(data$third, by=list(data$first), sum)

or

reqiure(reshape)
cast(melt(data), ~first, sum)


On Jun 28, 2010, at 9:30 PM, Yi wrote:

>
> first=c('u','b','e','k','j','c','u','f','c','e')
> second
> =
> c
> ('usa
> ','Brazil
> ','England','Korea','Japan','China','usa','France','China','England')
> third=1:10
> data=data.frame(first,second,third)