函数图像

clc,clear,clf

x1=0:0.1:10;

y1=x1.*exp(-3*x1);

h1=plot(x1,y1,\'r--\')

set(h1,\'linewidth\',6);

x2=0:0.1:2*pi;

y2=cos(0.5+3*sin(x2)./(1+x2.*x2));

hold on

h2=plot(x2,y2,\'k-*\');

set(h2,\'Markersize\',3);

legend(\'y1=x1.*exp(-3*x1)\',\'y2=cos(0.5+3*sin(x2)./(1+x2.*x2))\');