[R] Equivalent of match for data.frame

[Carlos J. Gil Bellosta]

Hello,

Why not something like

lapply(mydf, function(x) match(myarg, x) )

?

Best regards,

Carlos J. Gil Bellosta
http://www.datanalytics.com


On Sat, 2009-01-03 at 07:24 -0500, Sébastien wrote:
> Dear R-users,
> 
> I am translating a S script into R and having some troubles with the 
> match function. This function appears to work with vector and data.frame 
> in S, but not in R, e.g.:
> a <- rep((1:4), each = 10)
> b <- rep((1:10), times = 4)
> mydf <- data.frame(a,b)
> myarg <- mydf[1,]
> match(myarg, mydf)
> 
> # S returns 1 but R returns NA NA
> 
> I guess one could use match(interaction(myarg), interaction(mydf)) to do 
> the job but I was just wondering if there was a more direct function.
> 
> Thanks,
> 
> Sebastien
> 
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