www.gusucode.com > wavelet 源码程序 matlab案例代码 > wavelet/MODWPTUsingDefaultWaveletExample.m
%% MODWPT Using Default Wavelet % Obtain the MODWPT of an electrocardiogram (ECG) signal % using the default length 18 Fejer-Korovkin (|'fk18'|) wavelet. load wecg; wpt = modwpt(wecg); %% % |wpt| is a 16-by-2048 matrix containing the sequency-ordered wavelet packet % coefficients for the wavelet packet transform nodes. In this case, the % nodes are at level 4. Each node corresponds to an approximate passband % filtering of $[nf_s/2^5, (n+1)f_s/2^5)$, where _n_ = 0,...,15, and $f_s$ % is the sampling frequency. Plot the wavelet packet coefficients at % node (4,2), which is level 4, node 2. plot(wpt(3,:)) title('Node 4 Wavelet Packet Coefficients')