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%---------------------------------------------------------------------------- 
% exa031102_hilbert.m, for example 3.11.2 
% to test hilbert.m,and to find the Hilbert transform of signal x(n) 
%---------------------------------------------------------------------------- 
clear all; 
 
N=25; 
f=1/16; 
x=sin(2*pi*f*[0:N-1]); 
y=hilbert(x); 
% Çó x µÄÏ£¶û²®Ìر任£» 
 
subplot(221) 
stem(x,'.'); 
hold on; 
plot(zeros(size(x))); 
subplot(222) 
stem(imag(y),'.');         
% imag(y) is the Hilbert transform of x(n); 
hold on; 
plot(zeros(size(x)));