IA

clc;
clear;
k=input('k=');
num=[1 k];
den1=[1 0 1 1 1];
den2=[1 1 1 1];
den3=[2 1 1];
den4=[1 2 1];
den5=[1 1 2];
t=(0:0.1:50);
h1=step(num,den1,t);
hst=num(length(num)/den1(length(den1)));

h2=step(num,den2,t);
hst=num(length(num)/den2(length(den2)));

h3=step(num,den3,t);
hst=num(length(num)/den3(length(den3)));

h4=step(num,den4,t);
hst=num(length(num)/den4(length(den4)));

h5=step(num,den5,t);
hst=num(length(num)/den5(length(den5)));

subplot(4,1,1); plot(t,h1); xlabel('Timp'); ylabel('h1');
subplot(4,1,2); plot(t,h2); xlabel('Timp'); ylabel('h2');
subplot(4,1,3); plot(t,h3); xlabel('Timp'); ylabel('h3');
subplot(4,1,4); plot(t,h4); xlabel('Timp'); ylabel('h4');