If you just want that result, you can try tapply instead of by.
> tapply(res$Score,res$ID,max)
a b
2 1
On Mon, Nov 3, 2008 at 7:31 PM, Daniel Brewer <[EMAIL PROTECTED]> wrote:
> Hello,
>
> I am trying to return a vector from a simply by but I cannot get it
> working, even using simplify=TRUE.
>
>
Hello,
I am trying to return a vector from a simply by but I cannot get it
working, even using simplify=TRUE.
res <- data.frame(ID=c("a","a","a","b","b"),Score=c(0,1,2,0,1))
yoda <- by(res$Score,res$ID,max,simplify=T)
class(yoda)
[1] "by"
I would like it to return a vector with the names as the
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