Convert data in the traditional format (one state per interval) to mutually exclusive intervals that hold all the states that overlap for that interval.
ansible(events, states = NULL, gap = 1L, id_var = "patient_id", stockpile = T)Event file
Events of interest in the data. If NULL, assume all events are of interest.
Gap (in days) to apply in prescriptions of the same type. Useful when the gap should
only apply to link together identical states (if the allowable gap is to be applied universally, can be
added to end prior to using the function)
Group identifier in the data. Default is patient_id
Do identical events within a group need to be combined such that all intervals are mutually exclusive? Default is TRUE. Only turn to FALSE if you are CERTAIN the data does not need to be stockpiled--the behavior of interval combining is dependent on this assertion.