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1.STABILITY OF A SYSTEM USING MATLAB
%program to find stabilty of a system%
clc;
clear all;
close all;
a=input(‘num’);
b=input(‘den’);
t=tf(a,b)
p=pole(t);
r=real(p);
if length(find(r>0))>0
disp(‘unstable’)
elseif length(find(p==0))>1
disp(‘unstable’)
elseif length(find(r==0))>0
disp(‘marginally stable’)
else
disp(‘stable’)
end;
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