How can i plot zero and its frequency response
b = conv([1 -1.08 0.3132],[1 -1.315 0.6182])c =b;a = [0 0 0 0.0686][z,p,K] = tf2zp(c,a);figure(1)zplane(a,c)xlabel('Re(z)');ylabel('Im(z)');title('POLE DIAGRAM OF THE TRANSFER FUNCTION H(z)')w = -pi:(pi/500):pi;H = freqz(a,c,w);figure(2)subplot(2,1,1); plot(w, abs(H),'r','LineWidth',2);grid on;xlabel('frequency in pi units');ylabel('Magntiude');title('MAGNITUDE FREQUENCY RESPONSE OF THE TRANSFER FUNCTION H(z)')subplot(2,1,2);plot(w, angle(H),'r', 'LineWidth',2);grid on;xlabel('frequency in pi units');ylabel('phase');
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