You can't use cdiff in the vertical. You must calculate the derivative using a manual centered difference. For example, 'd 0.5*(geopot(z+1)-geopot(z-1))'<div><br>Jeff Duda<br><br><div class="gmail_quote">On Sun, May 6, 2012 at 7:32 PM, Aishwarya <span dir="ltr"><<a href="mailto:spaceaish@gmail.com" target="_blank">spaceaish@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br><br>I'm trying to find vertical derivative of geopotential (geopt). I tried d cdiff(geopt,z), i find the error :<br>
<span></span>Error from CDIFF: Specified dimension non varying<br>Operation Error: Error from cdiff function<br>
Error ocurred at column 1<br>DISPLAY error: Invalid expression<br> Expression = cdiff(u,z)<br><br>Any help would be great!<br><br>Thank you,<br>-------<br><font style="font-family:times new roman,serif" size="2"><i><span style="color:rgb(153,0,0)">Aishwarya,</span><br style="color:rgb(153,0,0)">
<span style="color:rgb(153,0,0)">Graduate Research Assistant,</span><br style="color:rgb(153,0,0)"><span style="color:rgb(153,0,0)">Atmospheric Sciences,</span><br style="color:rgb(153,0,0)"><span style="color:rgb(153,0,0)">University of Arizona,Tucson.</span></i></font><br>
<br>
<br>_______________________________________________<br>
gradsusr mailing list<br>
<a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>
<a href="http://gradsusr.org/mailman/listinfo/gradsusr" target="_blank">http://gradsusr.org/mailman/listinfo/gradsusr</a><br>
<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>Jeff Duda<br>Graduate research assistant<br>University of Oklahoma School of Meteorology<br>Center for Analysis and Prediction of Storms<br><br>
</div>