MATLAB Answers

How to plot CWT of a signal without cone of influence (COI)

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Achintha Ihalage
Achintha Ihalage on 19 Mar 2020
Answered: Prabhan Purwar on 28 Mar 2020
Default cwt() function plots the Wavelet transformation with COI marked in a dashed line. I want to get rid of this line.
How do I do that?
I found this answer helpful. But the generated cwt image is not the same as the default cwt() function. Generated two images are attached here.

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Answers (1)

Prabhan Purwar
Prabhan Purwar on 28 Mar 2020
Hi,
This seems to be an expected behaviour as COI shows where edge effects become significant and Gray regions outside the dashed white line delineate regions where edge effects are significant. For now there is no such option to remove the white line. Although you can try to reconstruct the scalogram function according to your needs by using outputs from cwt.
Hope it helps!!

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