[R 2.0.0 on Linux]
I tried:
> df <- data.frame(
grp1=factor( c('A' ,'A' ,'A' ,'D', 'D' ) ) ,
grp2=factor( c('a1','a2','a2','d1','d1') )
)
> df
grp1 grp2 val
1 A a1 1
2 A a2 2
3 A a2 4
4 D d1 8
5 D d1 16
I got:
> with( df, ave( val, grp1, grp2, FUN=sum ) )
[1] 1 24 24 NA NA
I have expected to get:
[1] 1 6 24
Do I misunderstand something with `ave' or is there a bug?
Thanks - Wolfram
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