README.md

Holo-Hilbert spectral analysis

HHSA

need to run ncl eemd first to get both IMFs in AM and FM. For the example:

the first part to get imfs_fm then calculate the upper evenlopement

the second part to get imfs_am

#%1.set initial parameters

Nnormal = 5 ; %number of spline envelope normalization for AM vlength = dSizes(1) vlength_1 = vlength -1 upper = vTmp ;; new((/dSizes(0),dSizes(1)/),typeof(vTmp)) upper = 0

do ni = 0,dSizes(0)-1 vimf = vTmp(ni,:)

%2.find absolute values

abs_vimf = abs(vimf)

%3.find the spline envelope for AM,take those out-loop start

do jj=0,Nnormal-1
    extvar=extrema(abs_vimf)
    spmaxTmp = extvar[0]
    spminTmp = extvar[1]
    flag     = extvar[2]
    id_len   = get1Dindex(spmaxTmp(:,0),vlength)
    spmax    = spmaxTmp(0:id_len,:)
    id_len   = get1Dindex(spminTmp(:,0),vlength_1)
    spmin    = spminTmp(0:id_len,:)

printVarSummary(spmax)

   dd    = ispan(0,vlength_1,1)
   upper(ni,:) = ftcurv(spmax(:,0),spmax(:,1),dd) ;; (xi, yi, 0.1, xo)

delete(spmax) delete(spmin) delete(extvar) end do end do copy_VarMeta(vTmp,upper)

eemd on upper to get AM

eemd

  goal = 12;
  ens = 1000;
  nos_wn = 0.01 ;; stringtoint(getenv("nos_wn")) / 100.  ;; 0.2 ;; 0.01;

print(nos_wn) dims = 1 ;; the time axial in upper is on number one !!! not zero opt = True opt@S_number = 4 opt@num_siftings = 50 opt@rng_seed = 0

1-D EEMD

imfs_am = eemd(upper,goal,ens,nos_wn,opt,dims)

printVarSummary(imfs_am) copy_VarMeta(upper(0,:),imfs_am(0,0,:))

Then need to run Matlab script run_upper_v1_v2.m to get normalized quadrature