Learning R by Cotton, Richard -- Read -- Imperial Library of Trantor

Index

Learning R Preface

About This Book What Is in This Book Which Chapters Should I Read? Conventions Used in This Book Goals, Summaries, Quizzes, and Exercises Using Code Examples Safari® Books Online How to Contact Us Acknowledgments

I. The R Language

1. Introduction

Chapter Goals What Is R? Installing R Choosing an IDE

Emacs + ESS Eclipse/Architect RStudio Revolution-R Live-R Other IDEs and Editors

Your First Program How to Get Help in R Installing Extra Related Software Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

2. A Scientific Calculator

Chapter Goals Mathematical Operations and Vectors Assigning Variables Special Numbers Logical Vectors Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

3. Inspecting Variables and Your Workspace

Chapter Goals Classes Different Types of Numbers Other Common Classes Checking and Changing Classes Examining Variables The Workspace Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

4. Vectors, Matrices, and Arrays

Chapter Goals Vectors

Sequences Lengths Names Indexing Vectors Vector Recycling and Repetition

Matrices and Arrays

Creating Arrays and Matrices Rows, Columns, and Dimensions Row, Column, and Dimension Names Indexing Arrays Combining Matrices Array Arithmetic

Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

5. Lists and Data Frames

Chapter Goals Lists

Creating Lists Atomic and Recursive Variables List Dimensions and Arithmetic Indexing Lists Converting Between Vectors and Lists Combining Lists

NULL Pairlists Data Frames

Creating Data Frames Indexing Data Frames Basic Data Frame Manipulation

Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

6. Environments and Functions

Chapter Goals Environments Functions

Creating and Calling Functions Passing Functions to and from Other Functions Variable Scope

Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

7. Strings and Factors

Chapter Goals Strings

Constructing and Printing Strings Formatting Numbers Special Characters Changing Case Extracting Substrings Splitting Strings File Paths

Factors

Creating Factors Changing Factor Levels Dropping Factor Levels Ordered Factors Converting Continuous Variables to Categorical Converting Categorical Variables to Continuous Generating Factor Levels Combining Factors

Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

8. Flow Control and Loops

Chapter Goals Flow Control

if and else Vectorized if Multiple Selection

Loops

repeat Loops while Loops for Loops

Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

9. Advanced Looping

Chapter Goals Replication Looping Over Lists Looping Over Arrays Multiple-Input Apply

Instant Vectorization

Split-Apply-Combine The plyr Package Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

10. Packages

Chapter Goals Loading Packages

The Search Path Libraries and Installed Packages

Installing Packages Maintaining Packages Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

11. Dates and Times

Chapter Goals Date and Time Classes

POSIX Dates and Times The Date Class Other Date Classes

Conversion to and from Strings

Parsing Dates Formatting Dates

Time Zones Arithmetic with Dates and Times Lubridate Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

II. The Data Analysis Workflow

12. Getting Data

Chapter Goals Built-in Datasets Reading Text Files

CSV and Tab-Delimited Files Unstructured Text Files XML and HTML Files JSON and YAML Files

Reading Binary Files

Reading Excel Files Reading SAS, Stata, SPSS, and MATLAB Files Reading Other File Types

Web Data

Sites with an API Scraping Web Pages

Accessing Databases Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

13. Cleaning and Transforming

Chapter Goals Cleaning Strings Manipulating Data Frames

Adding and Replacing Columns Dealing with Missing Values Converting Between Wide and Long Form Using SQL

Sorting Functional Programming Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

14. Exploring and Visualizing

Chapter Goals Summary Statistics The Three Plotting Systems Scatterplots

Take 1: base Graphics Take 2: lattice Graphics Take 3: ggplot2 Graphics

Line Plots Histograms Box Plots Bar Charts Other Plotting Packages and Systems Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

15. Distributions and Modeling

Chapter Goals Random Numbers

The sample Function Sampling from Distributions

Distributions Formulae A First Model: Linear Regressions

Comparing and Updating Models Plotting and Inspecting Models

Other Model Types Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

16. Programming

Chapter Goals Messages, Warnings, and Errors Error Handling Debugging Testing

RUnit testthat

Magic

Turning Strings into Code Turning Code into Strings

Object-Oriented Programming

S3 Classes Reference Classes

Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

17. Making Packages

Chapter Goals Why Create Packages? Prerequisites The Package Directory Structure Your First Package Documenting Packages Checking and Building Packages Maintaining Packages Summary Test Your Knowledge: Quiz Test Your Knowledge: Exercises

III. Appendixes

A. Properties of Variables B. Other Things to Do in R C. Answers to Quizzes D. Solutions to Exercises

E. Bibliography Index About the Author Colophon Copyright

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