matlab 画函数图像

clc;clear;close all;

t1=0:0.01:2*pi;
y1=-sin(t1);

t2=0:0.01:pi;
y2=-0.5*sin(2*t2);

plot(t1,y1,t2,y2);

legend('y1','y2');

clear;clc

t=0:0.01:2*pi; 

y1=-sin(t);

plot(t,y1)

t=0:0.01:pi; 

y2=-0.5*sin(2*t);

hold on

plot(t,y2)

grid on

结果如图所示

t=0:0.01:2*pi;
y1=-sin(t) ;
y2=-0.5*sin(2*t);