[ncl-talk] Power spectral analysis NCL

[Lyndz]

Dear NCL-experts,

I am trying to perform a power spectral analysis using NCL.

Attached are my script, output, and input data.

*Problem:*

I was able to do the example 1 from this page:
https://www.ncl.ucar.edu/Applications/spec.shtml
However, instead of variance, I would like the y axis to be the square of
rainfall (power to 2) and the x-axis to be in years.
Also attached is the sample expected output (expected_output.png).

Any suggestions on how I can modify my script to do this?
The output of the original script is "variance" vs "frequency".

I'll appreciate any help.

*Lyndz*
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