www.pudn.com > formant_track.zip > demo01.m

load('wioioi01','yp','fs'); 
 
% Determine formant track and pitch track and plot it 
[formant_tracks,pitch_track] = ftrack(yp,fs); 
 
% just to plot it on the same page 
figure; 
h1 = plot(formant_tracks); 
hold on; 
h2 = plot(10*pitch_track,'y.-'); 
legend([h1;h2],'F1','F2','F3','10*F0')