waverec.m

这是一系列的小波的程序

load sumsin;
s=sumsin;
[c,l]=wavedec(s,4,'sym1');
[nc,nl]=upwlev(c,l,'sym1');
subplot(311);plot(s);title('s');
subplot(312);plot(c);title('d4');
bubplot(313);plot(nc);title('d3')