I am interested in finding data with the nearest index match (lower) than my query. I notice that coll returns the first record if the number does not match any currently held.
If I have to, I will come up with a loop that decrements the query number until it no longer returns a dummy first record. This approach will work, but will be very slow as the size of the coll grows.
Maybe coll is not the right tool for what I am trying to do, any suggestions?