%
% Example 12.5 and Figure 12.8
%
clg
% If you use "hold" in the program it will
% be useful to start the program with "clg"
numr=[1 3]
denr=[1 4 5]
num=[200 600]
den1=[1 4 5]
den2=[1 10]
den3=[1 20]
den23=conv(den2,den3)
den=conv(den1,den23)
t=0:0.01:3;
step(num,den,t)
hold
step(numr,denr,t)
text(0.5,0.25,'(a)')
text(0.5,0.45,'(b)')
print -deps fig12_8.eps