imagesc(t,fliplr((1:size(im,1))/(2*size(im,1))),im,[inf,0]) set(gca, YDir , normal ) xlabel([ time ]) ylabel([ normalized frequency ]) title( Hilbert-Huang spectrum ) function [f,z]=fftfenxi(t,y) L=length(t) N=2^nextpow2(L)

HHT2.m

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