Roland Rau <roland.rproject <at> gmail.com> writes:
>
> does this do what you want?
>
> overlap <- function(a,b,c,d) {
> all(c:d %in% a:b)
> }
> overlap(1,5,3,4)
> overlap(1,2,3,4)
Do you really want this to be discrete? How about
overlap <- function(a,b,c,d) {
a<c && b>d
}
(although this assumes that a<b and c<d ...)
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