Hi All, I have a question about the feature extraction. I used the continuous wavelet transform(CWT)for my 1D signal and will select the mean and median frequency as features from that CWT. My question is how to select these frequencies from the CWT by using MATLAB. Thanks in advance
Feature Extraction
Started by ●January 1, 2008
Reply by ●January 3, 20082008-01-03
is your 1D signal discrete in nature? if yes then you can use discrete wavelet transform, to perform 1st level of decomposition. you will get the low frequency and the high frequency components after performing decimation. you can then perform operations like averaging (using filter commmand in matlab) or median operation. the wavelet decomosition can be done in matlab using the command [cA,cD] = dwt(X,'wname'), just type help dwt in matlab window and you will get details about the command. regards bharat pathak Arithos Designs www.arithos.com>Hi All, > >I have a question about the feature extraction. I used the continuous >wavelet transform(CWT)for my 1D signal and will select the mean andmedian>frequency as features from that CWT. My question is how to select these >frequencies from the CWT by using MATLAB. > >Thanks in advance > > >