<div dir="ltr">That just sets your fill value to a different value, FFT will still complain. You actually have to replace the fill values with actual data to make it work. Or find a data set that doesn't have any missing data to begin with.<div><br></div><div>Maria </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 30, 2016 at 10:38 PM, Anusha sathyanadh <span dir="ltr"><<a href="mailto:anushacalicut@gmail.com" target="_blank">anushacalicut@gmail.com</a>></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>Thanks a lot..<br><br></div>Can't i use res@FillValue =-999 etc??<br></div><div class="gmail_extra"><div><div class="h5"><br><div class="gmail_quote">On Thu, Mar 31, 2016 at 4:11 AM, Maria Gehne - NOAA Affiliate <span dir="ltr"><<a href="mailto:maria.gehne@noaa.gov" target="_blank">maria.gehne@noaa.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">In this case the error is actually telling you what you need to do here. Your data has missing values, but in order to use the FFT to compute the wavenumber-frequency spectrum you cannot have missing values in your data. So you need to figure out what to replace the missing values with. How you want to do this depends on what you are trying to find out using your data. Only you can decide this. A few common ways to fill missing values are 1) compute the climatology at each grid point and fill the missing values with that, 2) linear interpolation from the surrounding grid points, 3) linear interpolation in space and time.<div><br></div><div>Hope this helps,</div><div>Maria</div></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div>On Tue, Mar 29, 2016 at 8:03 AM, Anusha sathyanadh <span dir="ltr"><<a href="mailto:anushacalicut@gmail.com" target="_blank">anushacalicut@gmail.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>Dear NCL Users,<br>
<br>
<br>
When I am running Wheeler-Kiladis Space-Time Spectra (Code is directly<br>
available at NCL website), the program supposed to generate the plot<br>
with " wkSpaceTime", but am not getting any plot , rather it is giving<br>
a warning "nMsg=1442609 User must preprocess to remove _FillValue,<br>
FFTs do not allow missing values!! "..<br>
<br>
Can anybody help me , hereby attaching the script<br>
<span><font color="#888888"><br>
<br>
--<br>
<br>
<br>
<br>
<br>
*ANUSHA SATHYANADHSenior Research FellowDeparment of Atmospheric and Space<br>
SciencesPune university*<br>
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</blockquote></div><br><br clear="all"><br></div></div><span class="HOEnZb"><font color="#888888">-- <br><div><div dir="ltr"><b style="color:rgb(0,0,0)"><i><span style="font-family:georgia,serif">ANUSHA SATHYANADH</span><br style="font-family:georgia,serif"><span style="font-family:georgia,serif">Senior Research Fellow</span><br style="font-family:georgia,serif"><span style="font-family:georgia,serif">Deparment of Atmospheric and Space Sciences</span><br style="font-family:georgia,serif"><span style="font-family:georgia,serif">Pune university</span><br></i></b><br></div></div>
</font></span></div>
</blockquote></div><br></div>