模糊C-均值聚类,请教大虾帮我解释下面的程序
 

data = rand(100,2);
plot(data(:,1), data(:,2),'o');
[center,U,obj_fcn]=fcm(data,3);
maxU = max(U);
index1 = find(U(1,:) == maxU);
index2 = find(U(2,:) == maxU);
index3 = find(U(3,:) == maxU);
figure;
line(data(index1,1),data(index1,2),'linestyle','*','color','k');
line(data(index2,1),data(index2,2),'linestyle','o','color','r');
line(data(index3,1),data(index3,2),'linestyle','x','color','b');
hold on;
title('模糊C-均值聚类')
plot(center(1,1),center(1,2),'ko','markersize',10,'LineWidth',1.5);
plot(center(2,1),center(2,2),'ksquare','markersize',10,'LineWidth',1.5);
plot(center(3,1),center(3,2),'kd','markersize',10,'LineWidth',1.5);