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说明：Statistical.Analysis.with.R
说明：Statistical.Computing.in.Cplusplus.and.R
说明：Statistics for Censored Environmental Data using Minitab and R (2nd ed.)
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说明：The R Book Second Edition
说明：Time Series Analysis - With Applications in R, 2nd Ed
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说明：Unsupervised Learning with R
说明：using R for data analysis and graphics