%裝載leleccum信號(hào)
load leleccum;  
s = leleccum(1:3920); 
%用小波函數(shù)db1對(duì)信號(hào)進(jìn)行單尺度一維小波分解
[cA1,cD1]=dwt(s,'db1');   
subplot(3,1,1);
plot(s);
title('leleccum原始信號(hào)');
%用小波函數(shù)db1進(jìn)行信號(hào)的重構(gòu)
X = idwt(cA1,cD1,'db1');   
subplot(3,1,2);
plot(X);
title('小波重構(gòu)');
diffence = s-X;
subplot(3,1,3);
plot(diffence);
title('小波重構(gòu)誤差') ;