例1.66.txt

《MATLAB在控制系统中的应用》实例程序

 例1.66 
>> x=linspace(0,2*pi,30);   y=sin(x);  z=cos(x);
>> u=2*sin(x).*cos(x);  v=sin(x)./cos(x);
>> subplot(2,2,1),plot(x,y),axis([0 2*pi –1 1]),title('sin(x)')
>> subplot(2,2,2),plot(x,z),axis([0 2*pi –1 1]),title('cos(x)')
>> subplot(2,2,3),plot(x,u),axis([0 2*pi –1 1]),title('2sin(x)cos(x)')
>> subplot(2,2,4),plot(x,v),axis([0 2*pi –20 20]),title('sin(x)/cos(x)')