% u22 p26

clear all; close all;

clf

% h = 1, 0.5, 0.2, 0.1
h = 1;

% k = 1, 2, 4
k = 1;

den=[1 -1.5 0.5];
num=[0.25*k];

sysD = tf( num, den, h )

figure(1)
rlocus( sysD )
axis( [-3 2 -2 2])
set(findall(gcf,'type','line'),'linewidth',3);


figure(2)
nyquist( sysD )
axis( [-3 1 -10 10])
set(findall(gcf,'type','line'),'linewidth',3);
