import greenwood as gw
x = gw.event_time(time=[7, 5, 2], status=["e", "r", "i"], time_max=[None, None, 4])
gw.extract_status(x)['e', 'r', 'i']
Extract the status codes from an event-time vector.
Usage
Returns one single-letter code per element: "e", "r", "l", or "i".
x: Any list of str or None"e", "r", "l", or "i"), with None where it is missing.