[ncl-talk] Question about fourier_info

Lyndz olagueralyndonmark429 at gmail.com
Thu Feb 17 07:41:19 MST 2022


Dear NCL-experts,

I am using the *fourier_info *to extract the amplitude of the first and
second harmonics of a 24 time series (
https://www.ncl.ucar.edu/Document/Functions/Built-in/fourier_info.shtml)

*;[time | 24] x [lon | 42] x [lat | 68]*

*finfo_pa = fourier_info(pa(lon|:,lat|:,time|:),2,1.)*

But, I am only getting the amplitude, phase, and variance explained from
the output.

How can I extract the specific time/s (for first harmonics, it is one time,
for the 2nd harmonic it is two) when the wave reaches its peak (or the time
when I got the amplitude) for the first and second harmonics?

I'll appreciate any help on this.

Sincerely,
Lyndz
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