Its just made up for the time being, they are just made up values to explain what i want to be able to do. This data in same format as my actual data set. Cheers -- View this message in context: http://r.789695.n4.nabble.com/Subset-a-datafram-according-to-time-tp4372293p4386197.html Sent from the R help mailing list archive at Nabble.com.