求助高手，这段程序的错误怎么改正啊？十分感谢！！！

li03152034625

load noisbloc
s=noisbloc(1:1024);
ls=length(s);
[cA1,cD1]=dwt(s,'db4');
A1=upcoef('a',cA1,'db4',1,ls);
D1=upcoef('d',cD1,'db4',1,ls);
subplot(2,1,1);plot(A1);title('低频A1')
subplot(2,1,2);plot(D1);title('高频D1')
A0=idwt(cA1,cD1,'db4',ls);
figure(2)
subplot(2,1,1);plot(s);title('原始信号')
subplot(2,1,2);plot(A0);title('重构信号')
[C,L]=wavedec(s,5,'db4');
cA5=appcoef(C,L,'db4',5);
A5=wrcoef('a',C,L,'db4',3);
D1=wrcoef('d',C,L,'db4',1);
D2=wrcoef('d',C,L,'db4',2);
D3=wrcoef('d',C,L,'db4',3);
D4=wrcoef('d',C,L,'db4',4);
D5=wrcoef('d',C,L,'db4',5);
subplot(3,2,1);plot(A5);title('低频A5')
subplot(3,2,2);plot(D1);title('高频D1')
subplot(3,2,3);plot(D2);title('高频D2')
subplot(3,2,4);plot(D3);title('高频D3')
subplot(3,2,5);plot(D3);title('高频D4')
subplot(3,2,6);plot(D3);title('高频D5')
figure(3)
A0=waverec(C,L,'db4');
subplot(3,1,1);plot(s);title('原始信号')
subplot(3,1,2);plot(A0);title('重构信号')
subplot(3,1,3);plot(s-A0);title('误差信号')
err = max(abs(s-A0))


错误：？？？Attmpt to execute SCRIPT dwt as a function
Error in ==>bo1 at 4
[cA1,cD1]=dwt(s,'db4');
谢谢诸位！

VibrationMaster

没有安装小波包?路径不对?

li03152034625

回复 2 # VibrationMaster 的帖子

请问小波包在哪里下载啊，路径是指调用函数的路径？

ChaChing

使用which dwt -all检查下
猜测有同名script

manguoyong

上网下载小波包

piscesedwin

dwt格式没错，可能你matlab里的这个函数有错误，或是有重名的函数