[R] Appending elements to an array

[Thomas Lumley]

On Mon, 9 Jun 2003, Jonck van der Kogel wrote:

> Hi all,
> I am having a bit of trouble with the array structure of R. What I want
> to do is dynamically add/remove elements to an array. For example:
> Let's say I have created an array:
>  > myArray <- array(c(3,8), dim=c(1,2))
>  > myArray
>       [,1] [,2]
> [1,]    3    8
>
> And I now want to, for example, push an element (5,6) on to this array
> so it will read:
>       [,1] [,2]
> [1,]    3    8
> [2,]    5    6
>
> And then pop the first element of the array so the array now reads:
>       [,1] [,2]
> [1,]    5    6
>
> How would I do this? So far I've only read how to create an array if
> you know the dimensions beforehand, but I've been unable to find how to
> dynamically add/remove elements to/from an array.
>
> I've figured out how to do this with lists and vectors, but not with
> arrays. For this particular structure I need to work with arrays.
>


myArray <- array(c(3,8), dim=c(1,2))

#add to the bottom
myArray <- cbind(myArray, c(5,6))

# display the top
myArray
# remove the top
myArray <- myArray[-1,]


	-thomas