ISBN-10:
0387747303
ISBN-13:
9780387747309
Pub. Date:
03/19/2008
Publisher:
Springer New York
Data Manipulation with R / Edition 1

Data Manipulation with R / Edition 1

by Phil SpectorPhil Spector
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Overview

The R language provides a rich environment for working with data, especially data to be used for statistical modeling or graphics. Coupled with the large variety of easily available packages, it allows access to both well-established and experimental statistical techniques. However techniques that might make sense in other languages are often very inefficient in R, but, due to R’s—- ibility, it is often possible to implement these techniques in R. Generally, the problem with such techniques is that they do not scale properly; that is, as the problem size grows, the methods slow down at a rate that might be unexpected. The goal of this book is to present a wide variety of data - nipulation techniques implemented in R to take advantage of the way that R works,ratherthandirectlyresemblingmethodsusedinotherlanguages. Since this requires a basic notion of how R stores data, the first chapter of the book is devoted to the fundamentals of data in R. The material in this chapter is a prerequisite for understanding the ideas introduced in later chapters. Since one of the first tasks in any project involving data and R is getting the data into R in a way that it will be usable, Chapter 2 covers reading data from a variety of sources (text—les, spreadsheets,—les from other programs, etc. ), as well as saving R objects both in native form and in formats that other programs will be able to work with.

Product Details

ISBN-13: 9780387747309
Publisher: Springer New York
Publication date: 03/19/2008
Series: Use R!
Edition description: 2008
Pages: 154
Product dimensions: 6.10(w) x 9.25(h) x 0.24(d)

Table of Contents

Data in R.- Reading and writing data.- R and databases.- Dates.- Factors.- Subscripting.- Character manipulation.- Data aggregation.- Reshaping data.- Index.

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