You haven't provided us enough information. You should also provide
examples where we can access all the called objects; for example,
ttest() is not a built-in function, so we have no idea what it is.
Same goes for dat and y.
On Tue, Jun 2, 2009 at 11:43 AM, Hongyuan Cao wrote:
> Dear R user,
>
>
Dear R user,
I am trying to understand this following code. Basically it's using a
permutation method to calculate p value. But I would like to know exactly
how the permutation works.
#calculates null statistics
tt0 <- 0
set.seed(123)
B <- 100
for(i in 1:B) {
v <- sample(y)
tt0 <- c(tt0,ttest(dat
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