A kernel fisher discriminant analysis-based tree ensemble classifier: KFDA forest

Donghwan Kim, Seung Hwan Park, Jun-Geol Baek

Research output: Contribution to journalArticle

Abstract

In general, an ensemble classifier is more accurate than a single classifier. In this study, we propose an ensemble classifier called the kernel Fisher discriminant analysis forest (KFDA Forest), which is a tree-based ensemble method that applies KFDA. To promote diversity, bootstrap is used, and variable sets are randomly divided into K subsets. KFDA is performed on each subset to increase classification accuracy. KFDA maximizes the distance between classes while minimizing the distance within classes. KFDA can also be applied to classification problems in a nonlinear data structure using the kernel trick because it can transform the input space into a kernel feature space, commonly named a rotation, rather than performing a dimensionality reduction. Because new feature axes and KFDA projections are parallel, decision trees are used as a base classifier. To compare the proposed method with existing ensemble methods, we apply these to real datasets from the UCI and KEEL repositories.

Original languageEnglish
Pages (from-to)569-579
Number of pages11
JournalInternational Journal of Industrial Engineering : Theory Applications and Practice
Volume25
Publication statusPublished - 2018 Jan 1

Keywords

  • Classification
  • Decision trees
  • Ensemble classifier
  • Kernel fisher discriminant analysis
  • Rotation forest

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

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