I have asked a similar question some time ago in grads user forum. The link is given below<br><br><a href="http://gradsusr.org/pipermail/gradsusr/2010-December/012072.html">http://gradsusr.org/pipermail/gradsusr/2010-December/012072.html</a><br>
<br>and the answer from Jennifer Adams, IGES/COLA is quoted below<br><br>"The 'modify' command does not calculate a daily climatology, and there is no way to do that directly in GrADS. You must use your own code and make decisions about how to handle leap days, filtering, and other complications."<br>
<br><br>-- <br>Krishnamohan.K.S<br>CSIR Research Fellow<br>Department Of Atmospheric Sciences<br>Cochin University of Science and Technology<br>Cochin,India<br><br><br><br><br><div class="gmail_quote">On Tue, Oct 16, 2012 at 10:48 PM, Muthuvel Chelliah <span dir="ltr"><<a href="mailto:muthuvel.chelliah@noaa.gov" target="_blank">muthuvel.chelliah@noaa.gov</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear Grads Gurus,<br><br>Here is something to ponder.<br>In grads if we have long monthly data, we all know<br>we can compute monthly climo by, for example,<br><br>set t 1 12<br>define monclimo=ave(monthlydata,t+0,t=N,12)<br>
set t 1 N<br>modify monclimo seasonal.<br><br>In the same way, if I want to compute a quick and dirty daily climo,<br>and if had daily data for many years, I did,<br><br>set t 1 365<br>define dailyclimo=ave(dailydata,t+0,t=M,365)<br>
<br>the above step works, and the values look correct.<br>But the following step does not work!!<br><br>modify dailyclimo seasonal<br><br>It says: <br>MODIFY Error: Invalid time scaling in defined variable<br><br>Any ideas/suggestions? or is this not possible to do :-(<br>
<br>Thanks in advance!!<br><br>Muthu<span><font color="#888888"><br>-- <br><pre cols="72"><font style="font-family:tahoma,sans-serif">------------------------------------------------------------------<br>Dr.Muthuvel Chelliah, <a href="mailto:eMail%3AMuthuvel.Chelliah@noaa.gov" target="_blank">eMail:Muthuvel.Chelliah@noaa.gov</a><br>
Rm.3008, Climate Prediction Center, Ph:(301) 683-3393<br>NCEP/NWS/NOAA/U.S.Dept.of Commerce,<br>5830, University Research Court, NCWCP<br>College Park, MD 20740.</font><br></pre><br>
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