I will be extremely grateful if someone could please answer this basic question.

How can one plot a 3D (translation, scale, amplitude) plot from the Continuous wavelet transform (CWT) coefficients?

The CWT coefficient is a M X N matrix. Which of the axis corresponds to the translation, scale and Magnitude.

Thanks for your help.


It suffices to use the translation and scale as $(X,Y)$ axes, and build some elevation map from the absolute values of the CWT (or the phase, the real or imaginary parts). A simple example in Matlab is:

load mtlb
scal = abs(cwt(mtlb,'bump',Fs));
axis tight

CWT wavelet 3D plot as a surface


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