how can i plot the convex hull????

How can I plot the convex hull(k) in the axes:

net = [1:n;rand([1,n])*x;rand([1,n])*y];
net1 = net;
plot(net(2,:),net(3,:),'bo','MarkerSize',5,'MarkerFaceColor','b');
xx=net(2,:);
yy=net(3,:);
dt = DelaunayTri(xx',yy');
P = [xx',yy'];
[K AV] = convexHull(dt)

I try different plot but they don't work:

%trisurf(K, dt.xx(:,1),dt.xx(:,2),dt.xx(:,3), 'FaceColor', 'cyan')
%plot(dt.xx(K,1),dt.xx(K,2), 'r'); 
%K =convexHull(dt);
%plot (K,'-.r');

and I have different error message

plz help me

Answer 1

[Image Analyst]

Add this code:

hold on;
plot(xx(K), yy(K), 'r');

and don't use that function, like the help says. It's been deprecated. Use convhull() instead.

[ali hadjer]

THANK YOU SO MUCH ITS WORK :)

Answer 2

[ISRAA ADIL HAYDER AL-RUBAYE]

you have to specify the x,y coordinates of the nodes of the network that represents width and length of the network respectively ....

so the width,length should be assigned to nombers for example : 100

x=100;

y=100;

hopefully , thats going to work

israa

iraq