Given a set of markers, one wants to create a finer map at a given resolution.
Arguments map.frame A map.frame.object.
If return.nint is TRUE , a vector of integers is returned. It indicates how many intervals to place between this marker and the next to achive the desired minimum distance. The names attribute has suffixes added to indicate positions filled to the 'right' of existing markers. The returned vector is ordered by chromosome, then marker or filled locus.