NDLI: Simplified Stress and Simplified Silhouette Coefficient to a Faster Quality Evaluation of Multidimensional Projection Techniques and Feature Spaces

Content Provider	IEEE Xplore Digital Library
Author	Medeiros Eler, D. Batista Martins Teixeira, J. Alves Macanha, P. Garcia, R.E.
Copyright Year	2015
Description	Author affiliation: Dept. de Mat. e Comput. Presidente Prudente, UNESP-Univ. Estadual Paulista, Presidente Prudente, Brazil (Medeiros Eler, D.; Batista Martins Teixeira, J.; Alves Macanha, P.; Garcia, R.E.)
Abstract	Several multidimensional projection techniques have been proposed in literature over the last years. The quality of those techniques can be evaluated based on the dimensionality reduction or the clusters quality. The first evaluation aim to verify if the similarities from multidimensional space are preserved in projected space. While the second evaluation aim to verify if instances from a same class are placed in a same cluster in projected space. Respectively, Stress and Silhouette Coefficient are the main measures to quality evaluations. In this paper we present two new approaches -- named Simplified Stress and Simplified Silhouette Coefficient -- to speed up the computation of measures, enabling a faster evaluation of multidimensional projection techniques and feature spaces. We present experiments showing the high correlation between results obtained using original approaches and results obtained with those proposed in this paper. In addition, we show how to use Simplified Silhouette Coefficient to perform a fast feature space evaluation and selection.
Starting Page	133
Ending Page	139
File Size	666045
Page Count	7
File Format	PDF
ISSN	15506037
e-ISBN	9781467375689
DOI	10.1109/iV.2015.33
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-22
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stress Stress measurement Correlation Extraterrestrial measurements Artificial neural networks Time measurement Silhouette Coefficient Multidimensional Projection Quality Measures
Content Type	Text
Resource Type	Article

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