<div dir="ltr"><div><div><div>  ntim = 73<br>   nlat = 73<br>   mlon = 144<br><br>   y    = random_uniform(0,100,(/ntim,nlat,mlon/))<br>   y!0 = &quot;time&quot;<br>   y!1 = &quot;lat&quot;<br>   y!2 = &quot;lon&quot;<br><br>   printVarSummary(y)                ; [time | 73] x [lat | 73] x [lon | 144]<br>   print(&quot;==========&quot;)<br><br>   Y    = y(lat|:,lon|:,time|:)      ; convenience<br>   printVarSummary(Y)<br>   cf   = ezfftf (Y)                 ; ==&gt; cf(2,nlat,mlon,ntim/2)<br>   printVarSummary(cf)               ; [2] x [73] x [144] x [36]<br><br>  ;print(cf@xbar)<br><br>   do n=0,nlat*mlon-1<br>      cf@xbar(n) = 0.0               ; reconstruct with harmonics only<br>   end do<br><br>   cf(:,:,:, 0:4 ) = 0.0             ; set non-desired harmonics  to 0.0<br>   cf(:,:,:, 6:16) = 0.0<br>   cf(:,:,:,18:  ) = 0.0<br><br>  YY    = ezfftb(cf,cf@xbar)<br>   copy_VarMeta(Y, YY)<br>   YY@info = &quot;Only harmonics 5 and 18 retained: means removed&quot;<br>   printVarSummary(YY)    ; (lat,lon,time)<br><br><br></div>You can apply to your file.<br></div>Also, *you* cn determine how to write the file out.<br><br></div>Method 1 at<br><a href="http://www.ncl.ucar.edu/Applications/o-netcdf.shtml">http://www.ncl.ucar.edu/Applications/o-netcdf.shtml</a><br><div><div><div><br></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jan 2, 2017 at 7:41 PM, Lyndon Mark Olaguera <span dir="ltr">&lt;<a href="mailto:olagueralyndonmark429@gmail.com" target="_blank">olagueralyndonmark429@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><span style="font-size:12.8px">Dear All,</span><br></div><div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">I would like to perform fourier analysis to a  pentad (nonoverlapping five day average) time series(t=1 to t=73). I would like to get the sum of the 5th and 18th harmonics and output as a separate netcdf file. Is this possible to do in ncl?I am new in ncl. Ill appreciate if anyone can point me to the right functions that I can use here.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Here is the link to the file that I&#39;m working with.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><span style="font-size:small"><a href="https://drive.google.com/file/d/0B9faET7Bc2o8cWpmRE1yNldNVE9SQ1JNNF9XdXJPVUdqbUc0/view?usp=sharing" target="_blank">https://drive.google.com/file/<wbr>d/<wbr>0B9faET7Bc2o8cWpmRE1yNldNVE9SQ<wbr>1JNNF9XdXJPVUdqbUc0/view?usp=<wbr>sharing</a></span><br></div></div><div><div class="m_-8382382044128338985gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><br></div><div><div style="font-size:12.8px">Many thanks in advance,</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Lyndz</div></div></div></div></div></div></div></div></div></div></div>
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