How to use R's ellipsis feature when writing your own function?

Question

The R language has a nifty feature for defining functions that can take a variable number of arguments. For example, the function data.frame takes any number of

Answer 1

You gave half the answer already. Consider

R> my_ellipsis_function <- function(...) {
+   input_list <- as.list(substitute(list(...)))
+ }
R> print(my_ellipsis_function(a=1:10, b=2:20))
[[1]]
list

$a
1:10

$b
11:20

R> 

So this took two arguments a and b from the call and converted it to a list. Wasn't that what you asked for?