This takes the input schedule, and returns a new schedule, trimmed to the right length for mdl. Schedule steps are taken from the input schedule in order, finishing when the first step with a residue range greater than or equal to the number of residues in mdl is reached, unless the range is 9999. The value of last_scales for the input schedule is also considered; the last last_scales entries in the new schedule will always have the same scaling factors as the last last_scales entries in the input schedule, even if trimming occurred.
Example: See schedule() command.