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What is the scattering coefficient matrix returning when using the function FEATUREMATRIX?

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smat = featureMatrix(sf,x)
[smat,u] = featureMatrix(sf,x)
smat = featureMatrix(___,Name,Value)
I thought smat were the scattering coefficients and u were the scalogram coeffcients, however, when I plot smat, I do not quite uderstand what I am looking at, it does not look like the low frequencies of my signal. So, my question, is smat not the opposite of u? what is smat returning, matematically speaking?

Answers (1)

Neeraj Rajpurohit
Neeraj Rajpurohit on 7 Apr 2021
DISCLAIMER: These are my own views and in no way depict those of MathWorks.
featureMatrix function returns returns the scattering coefficient matrix. Please refer to the following documentation link.

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