6-18.m

来自「matlab图像程序.zip」· M 代码 · 共 13 行

L = linspace(0,2.*pi,6);    
xv = cos(L)';yv = sin(L)';
xv = [xv ; xv(1)]; 
yv = [yv ; yv(1)];                                  
%设定多边形
x = randn(250,1); 
y = randn(250,1);                                 
%设定散点
in = inpolygon(x,y,xv,yv);                           
%判断散点与多边形关系值
plot(xv,yv,x(in),y(in),'r+',x(~in),y(~in),'bo')              
%绘制图形