[R] Maximum of Maximum
arun
smartpink111 at yahoo.com
Fri Jan 10 21:31:46 CET 2014
Hi,
May be this helps:
set.seed(42)
vec1 <- sapply(1:1000,function(x) max(rnorm(1000,0,1)))
#or
set.seed(42)
vec2 <- replicate(1000,max(rnorm(1000,0,1)))
identical(vec1,vec2)
#[1] TRUE
set.seed(598)
res <- sample(vec1,100,replace=FALSE)
max(res)
#[1] 4.408794
A.K.
Hello I need some help in programming:
I want to after take a rnorm(1000,0,1) sample want to save the
max of it in a vector, this was difficult to me, then I need to repeat
this process 1000 times, so I shall have 1000 maximum from the normal of
samples of size 1000.
Then I want to sample from this maximum series a new sample, this time of size 100.
I drive a programm:
sample<-rnorm(1000,0,1)
for(i in 1:length(sample)){
maxim<-vector(mode="numeric",length(sample))
maxim[i]<-max(sample)
}
then my result was a vector with n-1 zeroes and the last one
value was a maximum. I think it took the last value, but I don't know
how to repair it.
I need most help, thanks
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