[R] Application of "merge" and "within"

[Jeff Newmiller]

Why do you want to do this?
-- 
Sent from my phone. Please excuse my brevity.

On May 27, 2016 4:00:14 PM PDT, Santosh <santosh2005 at gmail.com> wrote:
>Dear Rxperts!
>
>Is there a way to compute relative values.. using within().. function?
>
>Any assistance/suggestions are highly welcome!!
>Thanks again,
>Santosh...
>___________________________________________________________________
>A sample dataset and the computation "outside" within()  function is
>shown..
>
>q <- data.frame(GL = rep(paste("G",1:3,sep = ""),each = 50),
>                G  = rep(1:3,each = 50),
>                D = rep(paste("D",1:5,sep = ""),each = 30),
>                a = rep(1:15,each = 10),
>                t = rep(seq(10),15),
>                b = round(runif(150,10,20)))
>r <- subset(q,!duplicated(paste(G,a)),sel=c(G,a,b))
>names(r)[3] <- "bl"
>s <- merge(q,r)
> s$db <- s$b-s$bl
>
>> head(s,5)
>    G  a GL  D  t  b bl db
>1   1  1 G1 D1  1 13 13  0
>2   1  1 G1 D1  2 16 13  3
>3   1  1 G1 D1  3 19 13  6
>4   1  1 G1 D1  4 12 13 -1
>5   1  1 G1 D1  5 19 13  6
>
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>
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