Bagplots, boxplots and outlier detection for functional data

19 June 2008

Australian Statistics Conference. Melbourne, July 2008.

  • Where: First International Workshop on Functional and Operatorial Statistics, Toulouse
  • Where : Australian Statistical Conference Melbourne, Australia
  • Speakers: Professor Rob J Hyndman, Monash University & Han Lin Shang, Monash University

Abstract: We propose some new tools for visualizing functional data and for identifying functional outliers. The proposed tools make use of robust principal component analysis, data depth and highest density regions. We compare the proposed outlier detection methods with the existing “functional depth” method, and show that our methods have better performance on identifying outliers in French male age-specific mortality data.

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