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//Example 5.4
//Root locus for satellite attitude control with modified
//PD control or Lead compensator.
xdel(winsid())//close all graphics Windows
clear;
clc;
//------------------------------------------------------------------
//System transfer function and its root locus
s=poly(0,'s');
sysL=(s+1)/(s^2*(s+12));
evans(sysL,100)
//Title, labels and grid to the figure
exec .\fig_settings.sci; // custom script for setting figure properties
title(['Root locus for', '$L(s)=(s+1)/s^2(s+12)$'],'fontsize',3)
zoom_rect([-6 -3 2 3])
h=legend('');
h.visible = "off"
//------------------------------------------------------------------
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