Continuous Wavelet Analysis without COI

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Evan Grimes
Evan Grimes on 12 Jun 2018
Commented: Atik Faysal on 6 Jan 2021
I'm doing some wavelet analysis on a signal, but I really dont want the COI line on the plot. Any advice on how to get rid of it?

Answers (1)

Wayne King
Wayne King on 14 Jun 2018
Hi Evan, the CWT outputs everything you need to do the plot with the cone of influence.
For example:
load kobe;
% The sampling frequency is 1 Hz
[wt,f] = cwt(kobe,1);
t = 0:numel(kobe)-1;
hp = pcolor(t,f,abs(wt));
hp.EdgeColor = 'none';
xlabel('Seconds');
set(gca,'yscale','log');
ylabel('Hz');
Hope that helps

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