Cluster analysis

English: Cluster analysis is the classification of objects into different groups, or more precisely, the partitioning of a data set into subsets (clusters), so that the data in each subset (ideally) share some common trait - often proximity according to some defined distance measure.

Various

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Cluster analysis examples

Density clusters

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  Single-link hierarchical clustering
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  k-Means (k=2)
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  EM-algorithm (k=2)
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  DBSCAN

Gaussian distributed data

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  Single-link hierarchical clustering
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  k-Means (k=2)
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  EM-algorithm (k=2)
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  DBSCAN
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  OPTICS (with $\xi$ extraction)