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Influence function of projection-pursuit principal components for functional data

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  • Bali, Juan Lucas
  • Boente, Graciela

Abstract

In the finite-dimensional setting, Li and Chen (1985) proposed a method for principal components analysis using projection-pursuit techniques. This procedure was generalized to the functional setting by Bali et al. (2011), where also different penalized estimators were defined to provide smooth functional robust principal component estimators. This paper completes their study by deriving the influence function of the functional related to the principal direction estimators and their size. As is well known, the influence function is a measure of robustness which can also be used for diagnostic purposes. In this sense, the obtained results can be helpful for detecting influential observations for the principal directions.

Suggested Citation

  • Bali, Juan Lucas & Boente, Graciela, 2015. "Influence function of projection-pursuit principal components for functional data," Journal of Multivariate Analysis, Elsevier, vol. 133(C), pages 173-199.
    • Handle: RePEc:eee:jmvana:v:133:y:2015:i:c:p:173-199
    DOI: 10.1016/j.jmva.2014.09.004
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    References listed on IDEAS

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