1f0 <- function (x0) {
2 1
3}
4
5f1 <- function (x1 = c(1, 2, 3)) {
6 1
7}
8
9f2 <- function (x2, y2) {
10 1
11}
12
13f3 <- function (x3 = c(1, 2, 3), y3 = c(c(1,2,3))) {
14 1
15}
16
17f4 <- function (x4 = c(1, 2, 3), y4 = c(c(1,2,3)), ...) {
18 1
19}
20
21