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w = -4*pi:8*pi/511:4*pi;

num = [1 3 5 7 9 11 13 15 17];den = [1]; h = freqz(num, den, w); subplot(2,1,1)

plot(w/pi,real(h));grid

title('Real part of H(e^{j\\omega})') xlabel('\\omega /\\pi'); ylabel('Amplitude'); subplot(2,1,2)

plot(w/pi,imag(h));grid

title('Imaginary part of H(e^{j\\omega})') xlabel('\\omega /\\pi'); ylabel('Amplitude'); pause

subplot(2,1,1)

plot(w/pi,abs(h));grid

title('Magnitude Spectrum |H(e^{j\\omega})|') xlabel('\\omega /\\pi'); ylabel('Amplitude'); subplot(2,1,2)

plot(w/pi,angle(h));grid

title('Phase Spectrum arg[H(e^{j\\omega})]') xlabel('\\omega /\\pi');

ylabel('Phase in radians'); Ð޸ijÌÐòºóµÄÔËÐнá¹ûΪ:

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