[ncl-talk] Coherence analysis

[Soma Roy]

Can you kindly give me a hint how to use the function over a variable (say
3D variable as time, lat, lon) as you said?

Thanking you,
Soma

On Wed, Mar 20, 2019, 20:00 Dennis Shea <shea at ucar.edu wrote:

> For sure, these were created with NCL. However, I am not sure how these
> were created.
>
> NCL's *specxy_anal*
> <http://www.ncl.ucar.edu/Document/Functions/Built-in/specxy_anal.shtml>
>
> could have been applied *at each longitude* (loop over longitudes) and
> the results stored in arrays:
>
>    COHER(frq,lon), PHASE(frq,lon), COSPC(frq,lon),  QUSPC(frq,lon)
>
> ===
> Other, possibly useful, links:
>
> *http://www.ncl.ucar.edu/Applications/space_time.shtml*
> <http://www.ncl.ucar.edu/Applications/space_time.shtml>
>
> *http://www.ncl.ucar.edu/Applications/mjoclivar.shtml*
> <http://www.ncl.ucar.edu/Applications/mjoclivar.shtml>
> *Example 11*
> ====
>
> Good luck
>
> On Wed, Mar 20, 2019 at 2:42 AM Soma Roy <somaroy892 at gmail.com> wrote:
>
>> Hello,
>>
>> I am trying to calculate Coherence, Cospectrum, Quadrature and phase
>> between two variables (two signals).
>>
>> Is there any function available in ncl to plot like below attached figure
>> for the above?
>>
>> Please kindly inform me.
>>
>> Thanking you,
>> Soma
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