This book presents a wide array of methods applicable for reading data into R, and efficiently manipulating that data. In addition to the built-in functions, a number of readily available packages from CRAN (the Comprehensive R Archive Network) are also covered. All of the methods presented take advantage of the core features of R: vectorization, efficient use of subscripting, and the proper use of the varied functions in R that are provided for common data management tasks. Most experienced R users discover that, especially when working with large data sets, it may be helpful to use other programs, notably databases, in conjunction with R. Accordingly, the use of databases in R is covered in detail, along with methods for extracting data from spreadsheets and datasets created by other programs. Character manipulation, while sometimes overlooked within R, is also covered in detail, allowing problems that are traditionally solved by scripting languages to be carried out entirely within R. For users with experience in other languages, guidelines for the effective use of programming constructs like loops are provided. Since many statistical modeling and graphics functions need their data presented in a data frame, techniques for converting the output of commonly used functions to data frames are provided throughout the book.
具体描述
读后感
Data Manipulation with R - Summary Notes Jianghao Wang wangjh@lreis.ac.cn Dec. 11, 2012: version 0.1 Reference Spector, P., Data manipulation with R. Use R! 2008, New York: Springer. ix, 152 p. Chapter 1 Data in R Modes and classes The mode function ret...
评分Data Manipulation with R - Summary Notes Jianghao Wang wangjh@lreis.ac.cn Dec. 11, 2012: version 0.1 Reference Spector, P., Data manipulation with R. Use R! 2008, New York: Springer. ix, 152 p. Chapter 1 Data in R Modes and classes The mode function ret...
评分Data Manipulation with R - Summary Notes Jianghao Wang wangjh@lreis.ac.cn Dec. 11, 2012: version 0.1 Reference Spector, P., Data manipulation with R. Use R! 2008, New York: Springer. ix, 152 p. Chapter 1 Data in R Modes and classes The mode function ret...
评分Data Manipulation with R - Summary Notes Jianghao Wang wangjh@lreis.ac.cn Dec. 11, 2012: version 0.1 Reference Spector, P., Data manipulation with R. Use R! 2008, New York: Springer. ix, 152 p. Chapter 1 Data in R Modes and classes The mode function ret...
评分Data Manipulation with R - Summary Notes Jianghao Wang wangjh@lreis.ac.cn Dec. 11, 2012: version 0.1 Reference Spector, P., Data manipulation with R. Use R! 2008, New York: Springer. ix, 152 p. Chapter 1 Data in R Modes and classes The mode function ret...
用户评价
中文已出西安交大，翻译略次
评分中文已出西安交大，翻译略次
评分这是一本还不错的入门教材，适合刚开始学R，或者学了一段时间发现有些概念不清楚，可以回过头再看一遍，系统整理一下思路。对于中阶段使用者来说，太简单了，可以不看。有评论说记不住，R不用记，书是给你梳理总结更新用的。记不住查一下就好了。久了就记住了
评分这是一本还不错的入门教材，适合刚开始学R，或者学了一段时间发现有些概念不清楚，可以回过头再看一遍，系统整理一下思路。对于中阶段使用者来说，太简单了，可以不看。有评论说记不住，R不用记，书是给你梳理总结更新用的。记不住查一下就好了。久了就记住了
评分这是一本还不错的入门教材，适合刚开始学R，或者学了一段时间发现有些概念不清楚，可以回过头再看一遍，系统整理一下思路。对于中阶段使用者来说，太简单了，可以不看。有评论说记不住，R不用记，书是给你梳理总结更新用的。记不住查一下就好了。久了就记住了
相关图书
本站所有内容均为互联网搜索引擎提供的公开搜索信息，本站不存储任何数据与内容，任何内容与数据均与本站无关，如有需要请联系相关搜索引擎包括但不限于百度，google,bing,sogou 等
© 2025 book.quotespace.org All Rights Reserved. 小美书屋 版权所有