[ncl-talk] Wheeler-Kiladis Space-Time Spectra- Not generating plot

[Maria Gehne - NOAA Affiliate]

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.

Maria

On Wed, Mar 30, 2016 at 10:38 PM, Anusha sathyanadh <anushacalicut at gmail.com
> wrote:

> Thanks a lot..
>
> Can't i use res at FillValue =-999 etc??
>
> On Thu, Mar 31, 2016 at 4:11 AM, Maria Gehne - NOAA Affiliate <
> maria.gehne at noaa.gov> wrote:
>
>> 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.
>>
>> Hope this helps,
>> Maria
>>
>> On Tue, Mar 29, 2016 at 8:03 AM, Anusha sathyanadh <
>> anushacalicut at gmail.com> wrote:
>>
>>> Dear NCL Users,
>>>
>>>
>>> When I am running Wheeler-Kiladis Space-Time Spectra (Code is directly
>>> available at NCL website), the program supposed to generate the plot
>>> with " wkSpaceTime", but am not getting any plot , rather it is giving
>>> a warning  "nMsg=1442609  User must preprocess to remove _FillValue,
>>> FFTs do not allow missing values!!  "..
>>>
>>> Can anybody help me , hereby attaching the script
>>>
>>>
>>> --
>>>
>>>
>>>
>>>
>>> *ANUSHA SATHYANADHSenior Research FellowDeparment of Atmospheric and
>>> Space
>>> SciencesPune university*
>>>
>>> _______________________________________________
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>>>
>>
>
>
> --
>
>
>
>
> *ANUSHA SATHYANADHSenior Research FellowDeparment of Atmospheric and Space
> SciencesPune university*
>
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