sin_cos.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

% Name: Even_Odd.m
clear,close all
%t=-2*pi:0.01:2*pi;
n=-10:10;
r=0.2*pi;
e=exp(j*r*n);
subplot(221)
stem(n,imag(e),'r.'),
%hold on
%plot(t/pi,e,':'),hold on
%plot(t/pi,-e,':'),hold on
title('sin(wn)')
xlabel('Time n')
axis([-10,10,-1.1,1.1])
grid on