[C,L]=wavedec(x(1,:),3,'db4','shannon');里面的shannon是小波名吗,还有shannon entropy 负熵的程序怎编

[C,L]=wavedec(x(1,:),3,'db4','shannon');里面的shannon是小波名吗,还有shannon entropy 负熵的程序怎编
[C,L]=wavedec(x(1,:),3,'db4','shannon');里面的shannon是小波名吗,还有shannon entropy 负熵的程序怎编

[C,L]=wavedec(x(1,:),3,'db4','shannon');里面的shannon是小波名吗,还有shannon entropy 负熵的程序怎编
load jzxh.txt
s1=jzxh;
fs=500000; %采样频率
t=1:max(size(s1));
t=1000*t./fs;
t=t';
plot(s1),title('plot(s1)'),grid on;
%axis([0,51.2,-10000,10000]);
xlabel('时间（t） 单位：ms');
ylabel('电压（V)');
title('原始信号');
%小波分解
[c,l]=wavedec(s1,4,'db4');
[cd1,cd2,cd3,cd4]=detcoef(c,l,[1 2 3 4]);
ca4=appcoef(c,l,'db4',4);
a4=wrcoef('a',c,l,'db4',4);
d4=wrcoef('d',c,l,'db4',4);
d3=wrcoef('d',c,l,'db4',3);
d2=wrcoef('d',c,l,'db4',2);
d1=wrcoef('d',c,l,'db4',1);
%不需要的系数置零
caa4=zeros(size(ca4));
%消噪后信号重构,并画图
cl=[caa4',cd4',cd3',cd2',cd1']
s2=waverec(cl,l,'db4');
figure(2);
plot(t,s2);title('消噪后重构信号');grid on;
给你个例子,自己对这改改