matlab HMM工具箱

Fs =5120; % Sampling frequency T1 = 1/Fs; % Sample time L = size(x,1); % Length of signal NFFT = 2^nextpow2(L); % Next power of 2 from length of y Y = fft(x,NFFT)/L; Z=2*abs(Y(1:NFFT/2+1)); 非常好用。