[R] create list of vectors in for loop

[Jim Lemon]

Hi Paul,
The easy to understand way is:

n <- c(1:10)
# Create empty list to store vectors
list_of_vecs <- list()

# Create n vectors of random numbers - length 10. This works ok.
for (i in n){
 list_of_vecs[[i]]<-rnorm(10,0,1)
}

If you really want to use "assign":
for (i in n){
 vecname<-paste('vec_', i, sep = '')
 assign(vecname, rnorm(10,0,1))
 list_of_vecs[[i]]<-get(vecname)
}

Jim



On Tue, Dec 6, 2016 at 8:44 PM, Paul Sanfilippo <prseye at gmail.com> wrote:
> Hi,
>
> As an exercise, I am trying to create a list of 10 random number vectors in a loop. I can create the vectors but am unsure how to assemble them in the list as part of the loop. Any advice?
>
>
> # Number of vectors to create
> n <- c(1:10)
>
> # Create empty list to store vectors
> list_of_vecs <- list()
>
> # Create n vectors of random numbers - length 10. This works ok.
> for (i in seq_along(n)){
>   assign(paste('vec_', i, sep = ''), rnorm(10,0,1))
> }
>
> # But how do I append them in a list. This doesn’t work:
> for (i in seq_along(n)){
>   list_of_vecs <- list(list_of_vecs,(assign(paste('vec_', i, sep = ''), rnorm(10,0,1))))
> }
>
>
> Thank you,
>
> Paul
>
>
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.