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PAM (Partitioning Around Medoids) (1987)

  • PAM (Kaufman and Rousseeuw, 1987), built in Splus
  • Use real object to represent the cluster
    • Select k representative objects arbitrarily
    • For each pair of non-selected object h and selected object i, calculate the total swapping cost TCih
    • For each pair of i and h,
      • If TCih < 0, i is replaced by h
      • Then assign each non-selected object to the most similar representative object
    • repeat steps 2-3 until there is no change

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