跪求指点
用小波降噪:s=data(1:1799);
ls=length(s);
%用db1小波对原序列三层分解并提取系数
=wavedec(s,5,'db3');
ca3=appcoef(c,l,'db3',3);
cd3=detcoef(c,l,3);
cd2=detcoef(c,l,2);
cd1=detcoef(c,l,1);
%%用给定的软阈值进行降噪处理
cd1soft=wthresh(cd1,'s',1.465);
cd2soft=wthresh(cd2,'s',1.823);
cd3soft=wthresh(cd3,'s',2.768);
c2=;
s3=waverec(c2,l,'db1'); %%s3为降噪后的序列
为什么会出现
??? Input argument "IN3" is undefined.
Error in ==> wavedec at 35
Lo_D = IN3; Hi_D = IN4;
这样的错误啊???????????????????????
还请各位大侠指点啊,不胜感激
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