ECG Feature Extraction by DWT
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I am currently using DWT to perform feature extraction of ECG signals. The code that I have used is
[cA,cD] = dwt(ecgsig,'db4')
Since I am new to MATLAB, may I know if this is the correct way in obtaining the features of an ECG signal by DWT? If not, may I know the right way of doing so, please? Thank you for your help.