[R] Testing for arguments in a function

[Paul Johnson]

Just for the record, following Bill Dunlap's advice, I think this is
the best answer to the question as originally posed is.


myfun <- function(vec, i=stop("'i' must be supplied")){
vec[i]
}

> myfun(1:40,10)
[1] 10
> myfun(1:10)
Error in myfun(1:10) : 'i' must be supplied
>

-- 
Paul E. Johnson
Professor, Political Science
1541 Lilac Lane, Room 504
University of Kansas