Division of a vector

Goodmorning,

I would like to have help about that question: i've a vector which rapresents different zones in a 2D space.Main problem is that coordinates of differents zone are all togheter in one single vector,whereas i would like to have one different vector for each zone.

Attached i've reported two images which represent current situation:

• In image 1 - i've reported current situation, in which i've one single vector with the coordinate of the four zones
• In image 2 - i've reported desired situation, in which i've one vector for each zone.

I would like to know if there is a commande which is able to split vector,recognize different zones.

Attached a SavedWorkspace with one coordinate example, which can be used with following line code to plot the situation.

figure(1);grid on;hold on;
scatter(Zone_1_Overlap_Complete_Not_Zeros(:,1),Zone_1_Overlap_Complete_Not_Zeros(:,2),2);
hold off

[Matt J]

In your example, the zones all appear to be convex. Will this always be the case?

[massimiliano de martino]

Goodmorning,

It could happen that some of these zones can not be convex but concave.

Answer 1

[darova]

Try clusterdata()

load WorkSpace
X = Zone_1_Overlap_Complete_Not_Zeros(:,1);
Y = Zone_1_Overlap_Complete_Not_Zeros(:,2);
idx = clusterdata([X Y],'maxclust',4);
scatter(X,Y,3,idx,'filled')

See also kmeans()

[massimiliano de martino]

Thanks so much,it work perfectly.

Thanks for your support

[darova]

You are welcome