www.pudn.com > voiceprocessingtoolbox.rar > fftSym01.m

% 此範例展示實數訊號之 DFT 係數的共軛性 
 
N=64;			% 點數 
x=randn(N, 1); 
z=fft(x); 
plot(z, 'o'); grid on 
%compass(z); 
% 將對稱的點連起來 
for i=2:N/2+1 
	twoPoint=z([i, N-i+2]); 
	line(real(twoPoint), imag(twoPoint), 'color', 'r'); 
end