Hi. I'm looking for a way to compare the following within and between each Year for each Season and number of Shifts in each Treatment. Year Season Treatment Shifts (Log+1) I'm using R 2.6 (with R cmdr). I have difficulties as im a R-newbie. Could someoen guide me? Nicolai -- View this message in context: http://www.nabble.com/16-way-comparison.-tf4593155.html#a13112491 Sent from the R help mailing list archive at Nabble.com.