%Matlab Program 2-7
%Create system model
a=[-0.5572 -0.7814;0.7814 0];
b=[1 0]';
c=[1.9691 6.4493];
d=0;
sys=ss(a,b,c,d);

%Step response of the system
subplot(221)
step(sys)

%Initial condition response
x0=[1 0]';
subplot(222)
initial(sys,x0)