<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:10pt">Hello GrADS Users<br><br>I have a monthly dataset from 1979 to 2012.<br><br>I would like to calculate the climatology using 1981 - 2000.<br><br>The code that I have is given below, it uses 1979 - 2008.<br>"set t 1 12"<br>"clim = mean(precip,t+0,t=360,12)"<br>"modify clim seasonal"<br><br>Can anyone assist?<br><br>Regards<br>LC<br><br><div><br></div></div></body></html>