Service Analytics

8.Anomaly Detection

ABOD 
angle-based outlier degree

Rationale
  • Angles are more stable than distances in high dimensional spaces (cf. e.g. the popularity of cosine-based similarity measures for text data)
  • Object o is an outlier if most other objects are located in similar directions
  • Object o is no outlier if many other objects are located in varying directions
 

Diskussion