Step Response Pole Effect Demo

A demonstration that shows the effect of pole positions on step response by displaying both plots side by side.

for zeta = 0.1:0.1:2
sys = tf([9],[1,6*zeta,9]);
p = [1 6*zeta 9];
r = roots(p);
hold on
subplot(1,2,1),plot(real(r), imag(r),'o'), title('Pole Locations'), xlabel('Real'), ylabel('Imaginary')
hold on
subplot(1,2,2),step(sys)
pause(.5)
end