Uloha2_ANS_FEL

N = 1000;
%filtr coef
b= [1 0 0 0 -1];
a = [1 -1 0 0 0];
whiteNoise = randn(1,N);
y = filter(b,a,whiteNoise);
He0pi = (1-exp(-4*1i*0*pi))/(1-exp(1*1i*0*pi))

%plots
figure;
subplot(2,1,1)
freqz(b,a);
subplot(2,1,2)
zplane(b,a);
figure;
subplot(2,1,1)
plot(whiteNoise)
title('white noise before filtering')
subplot(2,1,2)
plot(y)
title('white noise after filtering')