Does pywt have a function to plot power spectrum?

[minyo...@gmail.com]

Power spectrum plotting? I couldn't find anything on API, want to double check. 

[Gregory Lee]

Hi,

Do you mean a power spectrum for the continuous wavelet transform? If so, there is a demo here that you could follow:

https://github.com/PyWavelets/pywt/blob/master/demo/cwt_analysis.py

There are currently no functions related to plotting or visualization in PyWavelets. It just implements the transforms themselves and some basic related operations like thresholding.

Cheers,

Greg

On Sat, Jul 27, 2019 at 10:01 AM <minyo...@gmail.com> wrote:

Power spectrum plotting? I couldn't find anything on API, want to double check. 

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[minyo...@gmail.com]

Thanks for the link. 

For future readers, MATLAB has a function to plot power spectrum for CWT. R has a package called WaveletComp which has a function wt.image() to plot power spectrum ( and which I am using) 

[Liviu Vladutu]

@minyo...@gmail.com you don't need pywt for power spectrum. You can use numpy: https://stackoverflow.com/questions/15382076/plotting-power-spectrum-in-python

[minyo...@gmail.com]

Aah thanks.

Again for future users I am using cumulative areawise significance testing on wavelet power spectra, so I have been using R 'biwavelet' and 'advbiwavelet'. pywt does not support this significance testing. Makes pretty plots really easily.