rec_fourier.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

% rec_fourier
clear,close all;
t=0:0.01:2*pi;
line([0,pi+0.5],[pi/4,pi/4]);axis([0,2*pi,-1,1]),
line([0,2*pi],[0,0]);
line([pi-0.5,2*pi],[-pi/4,-pi/4]);
text(pi+0.5,pi/4,'pi/4'),hold on;
text(pi-0.5,-pi/4,'-pi/4')
hold on
y=zeros(10,max(size(t)));x=zeros(size(t));
for k=1:2:51
    x=x+sin(k*t)/k;y=x;pause
    plot(t,y),hold on,grid on
end