matlab例程

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Matlab

wrcoefchonggou1.m：源码内容

							
t=0:0.01:20.5;  
s=5*sin(2*pi*5*t);
figure(1);
subplot(6,1,1); plot(s);
title('db6小波分解wrcoef重构');
ylabel('s');
axis([0,2500, -5, 5]);
[c1,l1]=wavedec(s,1,'db6');
scd1=wrcoef('d',c1,l1,'db6',1);
subplot(6,1,2); plot(scd1);
ylabel('d1');
axis([0,2500, -0.5, 0.5]);
[c2,l2]=wavedec(s,2,'db6');
scd2=wrcoef('d',c2,l2,'db6',2);
subplot(6,1,3); plot(scd2);
ylabel('d2');
axis([0,2500, -0.5, 0.5]);
[c3,l3]=wavedec(s,3,'db6');
scd3=wrcoef('d',c3,l3,'db6',3);
subplot(6,1,4); plot(scd3);
ylabel('d3');
axis([0,2500, -5, 5]);
[c4,l4]=wavedec(s,4,'db6');
scd4=wrcoef('d',c4,l4,'db6',4);
subplot(6,1,5); plot(scd4);
ylabel('d4');
axis([0,2500, -10, 10]);
sca4=wrcoef('a',c4,l4,'db6',4);
subplot(6,1,6); plot(sca4);
ylabel('a4');
axis([0,2500, -5, 5]);

						