www.gusucode.com > wavelet 源码程序 matlab案例代码 > wavelet/MODWPTFullPacketTreeAndPassbandCenterFrequenciesExample.m
%% MODWPT Full Packet Tree and Passband Center Frequencies % Obtain the MODWPT and full wavelet packet tree of an ECG waveform using % the default length 18 Fejer-Korovkin (|'fk18'|) wavelet. Extract and plot % the node coefficients at level 3, node 2. load wecg; [wpt,packetlevels,cfreq] = modwpt(wecg,'FullTree',true); p3 = wpt(packetlevels==3,:); plot(p3(3,:)) title('Level 3, Node 2 Wavelet Coefficients') %% % Display the center frequencies at level 3. cfreq(packetlevels==3,:)