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An Introduction to Statistical Learning

An Introduction to Statistical Learning
作者:Gareth James / Daniela Witten / Trevor Hastie / Robert Tibshirani
副标题:with Applications in R
出版社:Springer
出版年:2013-08
ISBN:9781461471370
行业:其它
浏览数:24

内容简介

An Introduction to Statistical Learning provides an accessible overview of the field of statistical learning, an essential toolset for making sense of the vast and complex data sets that have emerged in fields ranging from biology to finance to marketing to astrophysics in the past twenty years. This book presents some of the most important modeling and prediction techniques, along with relevant applications. Topics include linear regression, classification, resampling methods, shrinkage approaches, tree-based methods, support vector machines, clustering, and more. Color graphics and real-world examples are used to illustrate the methods presented. Since the goal of this textbook is to facilitate the use of these statistical learning techniques by practitioners in science, industry, and other fields, each chapter contains a tutorial on implementing the analyses and methods presented in R, an extremely popular open source statistical software platform. Two of the authors co-wrote The Elements of Statistical Learning (Hastie, Tibshirani and Friedman, 2nd edition 2009), a popular reference book for statistics and machine learning researchers. An Introduction to Statistical Learning covers many of the same topics, but at a level accessible to a much broader audience. This book is targeted at statisticians and non-statisticians alike who wish to use cutting-edge statistical learning techniques to analyze their data. The text assumes only a previous course in linear regression and no knowledge of matrix algebra.

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读书文摘

It turns out that R2 will always increase when more variables are added to the model, even if those variables are only weakly associated with the response.

1. 是否至少一个自变量能够预测因变量 2. 预测因变量的究竟是所有自变量,还是部分自变量 3. 模型究竟有多准? 4. 就已有的自变量数据,究竟该预测怎样的因变量,以及预测地有多准

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