Digital Low pass Filter in MATLAB | Part 1

%Code:-

w=-pi:0.01:pi;

num=[1];

den=[1 -0.5];

h=freqz(num,den,w);

subplot(2,1,1);

plot(w,abs(h));

ylabel('Magnitude');

subplot(2,1,2);

plot(w,angle(h));

ylabel('Phase');