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Outlier Discovery: Deviation-Based Approach

  • Identifies outliers by examining the main characteristics of objects in a group
  • Objects that “deviate” from this description are considered outliers
  • Sequential exception technique
    • simulates the way in which humans can distinguish unusual objects from among a series of supposedly like objects
  • OLAP data cube technique
    • uses data cubes to identify regions of anomalies in large multidimensional data

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