dm07301.m

the code of the book come form the book of marlix laboratory with the book of singal

%dm07301
%绘制周期矩形脉冲信号波形
t=0:0.01:10;
subplot(3,1,1)
f1=square(t);                       %产生周期为2π的方波信号
plot(t,f1)
axis([0,10,-1.2,1.2])
set(gcf,'color','w')
subplot(3,1,2)
f1=square(2*pi*t);                  %产生周期为1的方波信号
plot(t,f1)
axis([0,10,-1.2,1.2])
subplot(3,1,3)
f1=square(2*pi*t,80);                %产生周期为1、占空比为80%的矩形脉冲信号
plot(t,f1)
axis([0,10,-1.2,1.2])