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＜電子ブック＞
Statistical Methods for Imbalanced Data in Ecological and Biological Studies / by Osamu Komori, Shinto Eguchi
(JSS Research Series in Statistics. ISSN:23640065)

版	1st ed. 2019.
出版者	(Tokyo : Springer Japan : Imprint: Springer)
出版年	2019
本文言語	英語
大きさ	VIII, 59 p. 22 illus., 7 illus. in color : online resource
著者標目	*Komori, Osamu author Eguchi, Shinto author SpringerLink (Online service)
件　名	LCSH:Biometry LCSH:Statistics  LCSH:Social sciences -- Statistical methods  全ての件名で検索 FREE:Biostatistics FREE:Statistical Theory and Methods FREE:Statistics in Social Sciences, Humanities, Law, Education, Behavorial Sciences, Public Policy
一般注記	1. Imbalance Data -- 2. Weighted Logistic Regression -- 3. Beta-Maxent -- 4. Generalized-t Statistic -- 5. Machine Learning Methods for Imbalance Data This book presents a fresh, new approach in that it provides a comprehensive recent review of challenging problems caused by imbalanced data in prediction and classification, and also in that it introduces several of the latest statistical methods of dealing with these problems. The book discusses the property of the imbalance of data from two points of view. The first is quantitative imbalance, meaning that the sample size in one population highly outnumbers that in another population. It includes presence-only data as an extreme case, where the presence of a species is confirmed, whereas the information on its absence is uncertain, which is especially common in ecology in predicting habitat distribution. The second is qualitative imbalance, meaning that the data distribution of one population can be well specified whereas that of the other one shows a highly heterogeneous property. A typical case is the existence of outliers commonly observed in gene expression data, and another is heterogeneous characteristics often observed in a case group in case-control studies. The extension of the logistic regression model, maxent, and AdaBoost for imbalanced data is discussed, providing a new framework for improvement of prediction, classification, and performance of variable selection. Weights functions introduced in the methods play an important role in alleviating the imbalance of data. This book also furnishes a new perspective on these problem and shows some applications of the recently developed statistical methods to real data sets HTTP:URL=https://doi.org/10.1007/978-4-431-55570-4

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