Have used the suggested solution (the second method, as it seems a bit leaner) on my real data, and it works perfectly. Thanks. -- View this message in context: http://r.789695.n4.nabble.com/Create-new-records-based-on-event-dates-in-a-data-frame-tp4673839p4674082.html Sent from the R help mailing list archive at Nabble.com.