Hi All, I am looking for the exact same solution for times as for dates found in the thread located here http://www.mail-archive.com/r-help@r-project.org/msg84833.html What I need is to merge specified data frame of seven 10 minute intervals between 5:00 PM (17:00) and 6:00 PM (18:00) 5:00:00 PM 5:10:00 PM 5:20:00 PM 5:30:00 PM 5:40:00 PM 5:50:00 PM 6:00:00 PM So the end result is that any value missing for a time interval will be listed as "NA" instead of the time interval being omitted completely. I attempted the as.timeSeries function but it tells me no such function exists? And I have no clue what the proper syntax should be to designate the 10-minute intervals? Here's my go at it, which results in failure: times <- data.frame(Time = seq(as.timeSeries('17:00:00'), by 'minutes', length 7)) Many thanks in Advance, Kindra [[alternative HTML version deleted]]