MATLAB Function Reference

convhull

凸面外殼(Convex hull)

Syntax

K = convhull(x,y)
K = convhull(x,y,TRI)

Description

K = convhull(x,y) 傳回向量 x 和 y 凸面外殼(convex hull)的索引點。

K = convhull(x,y,TRI) 使用(由 delaunay 得到的)三角測量(triangulation)，而不是每次都重新計算。

Examples

xx = -1:.05:1; yy = abs(sqrt(xx));
[x,y] = pol2cart(xx,yy);
k = convhull(x,y);
plot(x(k),y(k),'r-',x,y,'b+')

See Also

convhull, delaunay, polyarea, voronoi

conv2

convhulln