MATLAB: Question about k means clustering

clustering

Hi there,
After you have clustered data, how can you find out or get a print out of what cluster each point has been assigned to?
For example if I cluster this simple data, how can I find out which cluster each data point belongs to
X = [randn(100,2)+ones(100,2);...
   randn(100,2)-ones(100,2)];
opts = statset('Display','final');
[idx,ctrs] = kmeans(X,2,...
                  'Distance','city',...
                  'Replicates',5,...
                  'Options',opts);
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)
Thank you

Best Answer

Isn't it the
idx
variable which you have plotted in different colors?
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