search for: tp2016063p2016063

...managed to do this using: Day1H = hourlydata[c(1:24),] but I'd like to be able to create groups for each day without doing this manually for each set of 24 rows. Any suggestions greatly appreciated Thanks -- View this message in context: http://n4.nabble.com/Grouping-rows-of-data-by-day-tp2016063p2016063.html Sent from the R help mailing list archive at Nabble.com.