画合成图有两种方法
用plot一次画图
例程:x = 1:100;
y1 = sin(2*pi*100*x);y2 = sin(2*pi*50*x);y3 = sin(2*pi*300*x);
plot(x,y1,x,y2,x,y3);
用hold on分次叠加画图
例程:x = 1:100;
y1 = sin(2*pi*100*x);y2 = sin(2*pi*50*x);y3 = sin(2*pi*300*x);
plot(x,y1);
hold on;plot(x,y2);
plot(x,y3);