MATLAB程序：蒙特卡洛法求椭圆面积

clear
n=500000;
x=rand(1,n);
y=rand(1,n);
x=2.*x;
y=3.*y;
r=(1/4).*x.*x+(1/9).*y.*y;
m=find(r<=1);
mm=length(m);
S=(mm/n)*24