[R] allocation/initialization of arrays/lists

[John Kane]

Try 
mylist <- NULL

and then just assign the subsets to each element of the list

mylist[[1]] <- data1[,1]

as an example

--- On Sun, 7/5/09, zrl <zrl1974 at gmail.com> wrote:

> From: zrl <zrl1974 at gmail.com>
> Subject: [R] allocation/initialization of arrays/lists
> To: r-help at stat.math.ethz.ch
> Received: Sunday, July 5, 2009, 1:58 PM
> Dear list,
> 
> I have a question regarding how to allocate or initialize
> the proper type of
> the arrays or lists.
> 
> I have a for loop, each iteration, I want it to assign a
> subset of a data
> frame to an element of an array or list.
> However, I am wondering how I should initialize or allocate
> the empty array
> or list so that it has the same number of the elements as
> the subsets I am
> going to assign and also make the data type is compatible
> to the subset I am
> going to assign to it.
> It should look like this:
> 
> #initialize or allocate.   ( I don't know
> how to)
> { some codes: initialize an array or list (which one is
> better?) with "n"
> elements}
> 
> #"for" loop for assigning a subset of a large data frame to
> the elements of
> the array or list (which on is better?)
> for (i in 1: n){
> array[i] <- df[df$V1==A[i],]
> }
> 
> 
> 
> 
> Thanks.
> 
> ZRL
> 
>     [[alternative HTML version deleted]]
> 
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