Appending Items to List in R

A very common programming problem is that a function must return a list of objects (itmes like trees...).

In R, we can do something like the following:

func_????? <- function ( ... )

{

    ret_TreeList = list()

    for(i in 1: ?????)

    {

        if(...)

        {

             ret_TreeList[[i]] = something

        }

        else(...)

        {

             ret_TreeList[[i]] = something else

        } 

        

    }

    return(ret_TreeList)

}

Then we cna use it like this:

>TreeList = func_?????(...)

>TreeList[3]

Hope it helps ;-}