>> t=0:0.01:2*pi;
t1=t';
x=[t1,t1,t1];
y=[sin(t1),sin(2*t1),sin(0.5*t1)];
plot(x,y)
上述图形以及代码只是单纯显示不同频率下的正弦图像
x=linspace(0,2*pi,100);%0-2π之间有100个元素
y=[sin(x);sin(2*x);sin(0.5*x)];
plot(x,y)
x=-2*pi:0.05:2*pi;
>> y=sin(x);
>> plot(x,y)
>> title('y=sin(x)')