[R] Odp: changing the number of elements in a list

[Petr PIKAL]

Hi

one option is to create an empty list with

my.list <- vector("list", n)

where n is number of elements in list. Then you can populate each element 
by

my.list[[x]] <- something

where x can be number or

my.list[x] <-something

where x is numeric vector

Regards
Petr


r-help-bounces at r-project.org napsal dne 09.06.2010 15:46:09:

> I would like to have a list where each element is a matrix, for example:
> 
> my.list <- list(matrix(0, ncol=3, nrow=3),
>                        matrix(0, ncol=3, nrow=3),
>                        matrix(0, ncol=3, nrow=3))
> 
> The problem is, I would like to be able to change automatically the 
number of 
> elements in the list (not only three as in the above example).
> 
> That is, the instruction creating the list would be a part of a function 
that 
> has an inputing parameter stating how many elements (matrices) the list 
has. 
> 
> I have tried several things, but none worked. 
> However, this seems to be a rather simple problem.
> All help is welcome!
> 
> LBA
> 
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