hi, I have some session data in a dataframe, where each session is recorded with a start and a stop date. Like this:
session_start session_stop =================== 2009-01-03 2009-01-04 2009-01-01 2009-01-05 2009-01-02 2009-01-09 A session is at least one day long. Now I want a dataframe with 'active sessions' per date. Like this: date active_sessions ============= 2009-01-01 1 2009-01-02 2 2009-01-03 3 2009-01-04 3 2009-01-05 2 2009-01-06 1 2009-01-07 1 2009-01-08 1 2009-01-09 1 How do I do that? I've searched the usual sources, but my newbie status and language barrier left me with nothing. So plz, anyone? ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
