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Data & Knowledge Engineering
Volume 63, Issue 2, November 2007, Pages 457-477
 
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doi:10.1016/j.datak.2007.03.006    How to Cite or Link Using DOI (Opens New Window)
Copyright © 2007 Elsevier B.V. All rights reserved.

Incremental procedures for partitioning highly intermixed multi-class datasets into hyper-spherical and hyper-ellipsoidal clusters

Qinglu Konga and Qiuming ZhuCorresponding Author Contact Information, a, E-mail The Corresponding Author

aDepartment of Computer Science, University of Nebraska at Omaha, Omaha, NE 68182-0050, USA

Received 12 November 2006; 
revised 17 February 2007; 
accepted 15 March 2007. 
Available online 31 March 2007.

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Abstract

Two procedures for partitioning large collections of highly intermixed datasets of different classes into a number of hyper-spherical or hyper-ellipsoidal clusters are presented. The incremental procedures are to generate a minimum numbers of hyper-spherical or hyper-ellipsoidal clusters with each cluster containing a maximum number of data points of the same class. The procedures extend the move-to-front algorithms originally designed for construction of minimum sized enclosing balls or ellipsoids for dataset of a single class. The resulting clusters of the dataset can be used for data modeling, outlier detection, discrimination analysis, and knowledge discovery.

Keywords: Data models; Data clustering; Mini-max partition; Geometrical approximation; Knowledge discovery

Article Outline

1. Introduction
2. Overview of geometrical data clustering
3. Minimum enclosing hyper-balls and hyper-ellipsoids constructions
4. Incremental construction of hyper-spheres and hyper-ellipsoids for multi-class data clustering
4.1. Move-to-front multi-hyper-ball-clustering algorithm (MFMHBC)
4.2. Move-to-front multi-hyper-ellipsoid-clustering algorithm (MFMHEC)
5. Experiment results
5.1. Case one moderately intermixed data set of two classes in two-dimensional space
5.2. Case two – three highly intermixed classes in two-dimensional space
5.3. Case three – Intermixed data set of three classes in three-dimensional space
5.4. Comparison of MFMHBC with MFMHEC in multiple dimensions
5.4.1. Experiments with respect to number of data points in multiple dimensional space
5.4.2. Experiments with respect to different dimensions of the data sets
5.4.3. Experiment with respect to data sets of different distribution densities
6. Summary and conclusions
References
Vitae

















Data & Knowledge Engineering
Volume 63, Issue 2, November 2007, Pages 457-477
 
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