[R] Returning a vector from by

[Daniel Brewer]

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 ID column.  The
only way I could work out how to do this was

result <- as.vector(yoda)
names(result) <- names(yoda)
result
a b
2 1

Is there a better way?

Thanks

Dan

-- 
**************************************************************
Daniel Brewer, Ph.D.

Institute of Cancer Research
Molecular Carcinogenesis
Email: daniel.brewer at icr.ac.uk
**************************************************************

The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.

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