小波分解.zip_manufacturing964_solargfm_小波_小波分解_小波分解信号

close all clear all fs=10000; ts=1/fs; %t=1/fs:1/fs:30000/fs; %r=2*sin(2*pi*50.0*t); %z=r'; z=importdata('1.mat'); N=length(z); t=(0:N-1)*ts; tic; [c,l]=wavedec(z(:,1),6,'db10'); aa6=wrcoef('a',c,l,'db10',6); %重构1-5层细节系数 ad6=wrcoef('d',c,l,'db10',6); ad5=wrcoef('d',c,l,'db10',5); ad4=wrcoef('d',c,l,'db10',4); ad3=wrcoef('d',c,l,'db10',3); ad2=wrcoef('d',c,l,'db10',2); ad1=wrcoef('d',c,l,'db10',1); toc; subplot(311) plot(t,aa6); subplot(312) plot(t,ad6); subplot(313) plot(t,ad5);