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fs=8192;N=4096;
t=(0:N-1)*1/fs;
[imf,ort,nbits]=emd(x,t,[0.05,0.5,0.05]);     
L=size(imf,1);
X=0;
for i=1:L;
X=imf(i,+X;
end
[A,f,tt] = hhspectrum(imf,t,l,0);
ÏÂÃæÊDZ¨´í£º
Warning: HILBERT ignores imaginary part of input.
> In hilbert at 39
  In hhspectrum at 44
Undefined function 'instfreq' for input arguments of type 'double'.

Error in hhspectrum (line 45)
  f(i,=instfreq(an(i,',tt,l)';

Çó¸ßÊÖ½â´ð£¡¸Ð¼¤²»¾¡



[S,freq]=hspec(imf,N);
ÏÂÃæÊDZ¨´í£º
Warning: HILBERT ignores imaginary part of input.
> In hilbert at 39
  In hspec at 39
Undefined function 'instfreq' for input arguments of type 'double'.

Error in hspec (line 45)
   freq(:,i) = instfreq(z(:,i)); % instantaneous frequency

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