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

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Lucrezia Cester
Lucrezia Cester 2021-3-11
回答： Neeraj Rajpurohit 2021-4-7
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?

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回答（1 个）

Neeraj Rajpurohit
DISCLAIMER: These are my own views and in no way depict those of MathWorks.
Greetings,
featureMatrix function returns returns the scattering coefficient matrix. Please refer to the following documentation link.
https://www.mathworks.com/help/wavelet/ref/waveletscattering.featurematrix.html

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