ex_2.m

信号与系统分析以matlab实现

%ex6   p131
syms t
f=sym('2*heaviside(t)-heaviside(t-1)-heaviside(t-2)')
figure(1),ezplot(f,[-3 3]),grid on
f1=subs(f,t,-t)
f2=subs(f,t,t-2)
f3=subs(f,t,1-2*t)
f4=subs(f,t,1/2*t+1)
figure(2)
subplot(2,2,1),ezplot(f1,[-3,3]),grid on
subplot(2,2,2),ezplot(f2,[-3,6]),grid on
subplot(2,2,3),ezplot(f3,[-3,3]),grid on
subplot(2,2,4),ezplot(f4,[-3,3]),grid on