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//Example 8.3
clc;
// Define the polynomial
s=poly(0,"s");
p=3+10*s+5*s^2+s^3;
// Calculate the routh of above polynomial
r=routh_t(p);
disp(r,"Routh array=");
A=r(:,1);
c=0;
x1=0;
eps=0;
for i=1:4
x1=A(i,1);
if x1<0
c=c+1;
end
end
if(c>=1) then
printf("system is unstable");
else
printf("system is stable");
end
x=roots(p);
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