NDLI: Feature Selection Metric Using AUC Margin for Small Samples and Imbalanced Data Classification Problems

Content Provider	IEEE Xplore Digital Library
Author	Alshawabkeh, M. Aslam, J.A. Dy, J. Kaeli, D.
Copyright Year	2011
Abstract	Feature selection helps us to address problems possessing high dimensionality, retaining only those features that are most important for the classification task. However, traditional feature selection methods fail to account for imbalanced class distributions, leading to poor predictions for minority class samples. Recently, there has been a growing interest around the Area Under ROC curve (AUC) metric due to the fact that it can provide meaningful performance measures in the presence of imbalanced data. In this paper, we propose a new margin-based feature selection metric that defines the quality of a set of features by considering the maximized AUC margin it induces during the process of learning with boosting. Our algorithm measures the cumulative effect each feature has on the margin distribution associated with the weighted linear combination that boosting produces over the positive and the negative examples. Experiments on various real imbalanced data sets show the effectiveness of our algorithm when faced with selecting informative features from small data possessing skewed class distributions.
Starting Page	145
Ending Page	150
File Size	274431
Page Count	6
File Format	PDF
ISBN	9781457721342
DOI	10.1109/ICMLA.2011.70
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-12-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Measurement Support vector machines Training area under the ROC curve (AUC) Accuracy margin feature election boosting Boosting Cancer
Content Type	Text
Resource Type	Article

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