Dear Rxperts!
Is there a way to compute relative values.. using within().. function?
Any assistance/suggestions are highly welcome!!
Thanks again,
Santosh...
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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