%基于小波變換的心電信號的壓縮
ecg=fopen('ECG1.dat','r');
N=1201;
data=fread(ecg,N,'int16');
data=data/10000;
fclose(ecg);
x=data;
wavename='db3';
level=4;
xd=wden(x,'minimaxi','s','mln',level,wavename);
t=0:0.004:4.8;
subplot(311);
plot(t,x);
title('從人體采集的原始的ECG信號');
subplot(313);
plot(t,xd);
title('Minimax規則閾值壓縮后的ECG信號(wname=db3 level=4)');