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Estimating the number of clusters via System Evolution

from Estimating the number of clusters via System Evolution by Kaijun Wang
estimate number of clusters for far clusters, small-larger clusters, slightly overlapping clusters

ind2cluster(labels) 
function [clusters, newlabels] = ind2cluster(labels)

C = unique(labels);
newlabels = labels;
k = length(C);
clusters = cell(1,k);
for i = 1:k
  ind = find(labels==C(i));
  clusters{i} = ind;
  newlabels(ind) = i;
end

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