how to plot higher order levels of the wavelet scattering transform?

As the title says, how to I visualize with a scalogram the different outputs of the scattering transform? In the same way that is done in this figure from this paper https://arxiv.org/pdf/1304.6763.pdf where at the top there is the signal, middle it's first layer of the scattering transform and third the second layer.

Answer 1

[Yash]

Hi Lucrezia,

Once you have already computed the scattering transform coefficients and stored them in a variable, you can use the 'imagesc' function in MATLAB to visualize the different outputs of the scattering transform, including higher order levels. The 'imagesc' function is used to create a visual representation of the coefficients, with the magnitude of each coefficient represented by a color. Then you can use the 'colorbar' function to add color scale to the plot.

You can refer to the documentations below to know more about these functions:

• 'imagesc' function: https://in.mathworks.com/help/matlab/ref/imagesc.html
• 'colorbar' function: https://in.mathworks.com/help/matlab/ref/colorbar.html

Hope this helps