m_exam13.m

西交大刘树棠写的《数字信号处理》那本书的所有源代码

% example 13
x=linspace(0,2*pi,30);
y=sin(x);
z=cos(x);
a=2*sin(x).*cos(x);
b=sin(x)./(cos(x)+eps);
h1=figure;
plot(x,y);axis([0 2*pi -1 1]),title('sin(x)');
h2=figure;
plot(x,z);axis([0 2*pi -1 1]),title('cos(x)');
h3=figure
plot(x,a);axis([0 2*pi -1 1]),title('2sin(x)cos(x)');
h4=figure;
plot(x,b);axis([0 2*pi -20 20]),title('sin(x)/cos(x)');