clear
close all
s=tf('s');
t=0:0.001:30;

K=1;
Gp=K/(s*(s+1)*(s+2));
figure; rlocus(Gp)

K=0:1:100;
r=rlocus(Gp,K);
figure; plot(r,'x')
grid
% axis([-2.5 0.5 -10 10])


K=1.5;
Glc=feedback(K*Gp,1);

figure; step(Glc,t)
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