jiaoantu3_10.m

经典《信号与系统》教程的matlab例程,对深入理解信号与系统相关概念有很大帮助

w=-3*pi:0.001*pi:3*pi;
P4=4*sin(2*w)./(2*w);
P2=2*sin(w)./(w);
subplot(3,1,1)
plot(w,P4),axis([-10,10,-2,5])
subplot(3,1,2)
plot(w,P2),axis([-10,10,-2,5])
subplot(3,1,3)
plot(w,P4+P2),axis([-10,10,-2,7])