matlab kmeans 1000次跟5次幾乎一樣

X=[randn(100,2)+ones(100,2);randn(100,2)-ones(100,2) ];
opts = statset('Display','final');
[idx,ctrs] = kmeans(X,2,'Replicates',5,'Options',opts,'emptyaction','drop');
subplot(2,1,1);
plot(X(idx==1,1),X(idx==1,2),'r.','MarkerSize',12)
hold on
plot(X(idx==2,1),X(idx==2,2),'b.','MarkerSize',12)

plot(ctrs(:,1),ctrs(:,2),'kx',...
     'MarkerSize',12,'LineWidth',2)
plot(ctrs(:,1),ctrs(:,2),'ko',...
     'MarkerSize',12,'LineWidth',2)
legend('Cluster 1','Cluster 2','Centroids',...
       'Location','NW')

subplot(2,1,2);
[idx,ctrs] = kmeans(X,2,'Replicates',1115,'Options',opts,'emptyaction','drop');
subplot(2,1,2);
plot(X(idx==1,1),X(idx==1,2),'r.','MarkerSize',12)
hold on
plot(X(idx==2,1),X(idx==2,2),'b.','MarkerSize',12)

plot(ctrs(:,1),ctrs(:,2),'kx',...
     'MarkerSize',12,'LineWidth',2)
plot(ctrs(:,1),ctrs(:,2),'ko',...
     'MarkerSize',12,'LineWidth',2)
legend('Cluster 1','Cluster 2','Centroids',...
       'Location','NW')