📄 p3_6.m
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% Program P3_6% Time Reversal Property of DTFTclf;w = -pi:2*pi/255:pi;num = [1 2 3 4];L = length(num)-1;h1 = freqz(num, 1, w);h2 = freqz(fliplr(num), 1, w);h3 = exp(w*L*i).*h2;subplot(2,2,1)plot(w/pi,abs(h1));gridtitle('Magnitude Spectrum of Original Sequence')subplot(2,2,2)plot(w/pi,abs(h3));gridtitle('Magnitude Spectrum of Time-Reversed Sequence')subplot(2,2,3)plot(w/pi,angle(h1));gridtitle('Phase Spectrum of Original Sequence')subplot(2,2,4)plot(w/pi,angle(h3));gridtitle('Phase Spectrum of Time-Reversed Sequence')
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