(On Line Empirical Mode Decomposition) computes on-line EMD
[imf,ort,nbit] = emd_online(x) [imf,ort,nbit] = emd_online([],x) [imf,ort,nbit] = emd_online(t,x) [imf,ort,nbit] = emd_online([],x,stop) [imf,ort,nbit] = emd_online(t,x,stop) [imf,ort,nbit] = emd_online([],x,stop,nbpresift) [imf,ort,nbit] = emd_online(t,x,stop,nbpresift) [imf,ort,nbit] = emd_online([],x,stop,nbpresift,tst) [imf,ort,nbit] = emd_online(t,x,stop,nbpresift,tst) [imf,ort,nbit] = emd_online(t,x,stop,nbpresift,tst,tst2) [imf,ort,nbit] = emd_online(t,x,stop,nbpresift,tst,tst2)
analyzed signal
sampling times (default : 1:length(x))
threshold, and threshold2 (optional) tolerance, and tolerance2 (both optional) for sifting stopping criterion default : [0.05,0.5,20,100]
number of sifting by blocks iterations (default 4)
if equals to 1 shows sifting steps
if equals to 1 shows sifting by blocks steps
intrinsic mode functions (last line = residual)
index of orthogonality
number of iterations for each mode
IMPORTANT: EMD_ONLINE does not truly apply EMD on-line but it does AS IF. It is rather a demonstration that EMD can be applied on-line.
stopping criterion for sifting : at each point : mean amplitude < threshold*envelope amplitude if mean amplitude > mtlb_max(envelope amplitude)/tolerance & at each point : mean amplitude < threshold2*enveloppe amplitude if mean amplitude > mtlb_max(envelope amplitude)/tolerance2
s = rand(1,512,'normal'); imf = emd_local(s); emd_visu(s,imf); See Also local_peaks io | ![]() | ![]() |