Hybrid cluster ensemble framework based on the random combination of data transformation operators

Zhiwen Yu, Hau San Wong, Jia You, Guoxian Yu, Guoqiang Han

Research output: Journal article publicationJournal articleAcademic researchpeer-review

36 Citations (Scopus)

Abstract

Given a dataset P represented by an n×m matrix (where n is the number of data points and m is the number of attributes), we study the effect of applying transformations to P and how this affects the performance of different ensemble algorithms. Specifically, a dataset P can be transformed into a new dataset P′ by a set of transformation operators Φ in the instance dimension, such as sub-sampling, super-sampling, noise injection, and so on, and a corresponding set of transformation operators Ψ in the attribute dimension. Based on these conventional transformation operators Φ and Ψ, a general form Ω of the transformation operator is proposed to represent different kinds of transformation operators. Then, two new data transformation operators, known respectively as probabilistic based data sampling operator and probabilistic based attribute sampling operator, are designed to generate new datasets in the ensemble. Next, three new random transformation operators are proposed, which include the random combination of transformation operators in the data dimension, in the attribute dimension, and in both dimensions respectively. Finally, a new cluster ensemble approach is proposed, which integrates the random combination of data transformation operators across different dimensions, a hybrid clustering technique, a confidence measure, and the normalized cut algorithm into the ensemble framework. The experiments show that (i) random combination of transformation operators across different dimensions outperforms most of the conventional data transformation operators for different kinds of datasets. (ii) The proposed cluster ensemble framework performs well on different datasets such as gene expression datasets and datasets in the UCI machine learning repository.
Original languageEnglish
Pages (from-to)1826-1837
Number of pages12
JournalPattern Recognition
Volume45
Issue number5
DOIs
Publication statusPublished - 1 May 2012

Keywords

  • Cluster ensemble
  • Data mining
  • Data transformation
  • Gene expression profile

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Computer Vision and Pattern Recognition
  • Artificial Intelligence

Cite this