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Preface | ||
Acknowledgments | ||
1 | Introducing R and S-Plus | 1 |
1.1 | S Basics | 1 |
1.2 | An Extended Illustration: Duncan's Occupational-Prestige Regression | 18 |
1.3 | S Functions for Basic Statistics | 34 |
2 | Reading and Manipulating Data | 37 |
2.1 | Data Input | 38 |
2.2 | Working with Data Frames | 49 |
2.3 | Matrices, Arrays, and Lists | 68 |
2.4 | Data Attributes, Modes, and Classes | 78 |
3 | Exploring and Transforming Data | 85 |
3.1 | Examining Distributions | 86 |
3.2 | Examining Relationships | 93 |
3.3 | Examining Multivariate Data | 102 |
3.4 | Transforming Data | 106 |
4 | Fitting Linear Models | 119 |
4.1 | Linear Least Squares Regression | 119 |
4.2 | Dummy-Variable Regression | 126 |
4.3 | Analysis of Variance Models | 136 |
4.4 | User-Specified Contrasts | 142 |
4.5 | General Linear Hypotheses | 145 |
4.6 | Data and Confidence Ellipses | 147 |
4.7 | More on lm and Model Formulas | 149 |
5 | Fitting Generalized Linear Models | 155 |
5.1 | The Structure of Generalized Linear Models | 155 |
5.2 | Models for Categorical Responses | 158 |
5.3 | Poisson Generalized Linear Models for Count Data | 177 |
5.4 | Odds and Ends | 185 |
5.5 | Fitting Generalized Linear Models by Iterated Weighted Least Squares | 189 |
6 | Diagnosing Problems in Linear and Generalized Linear Models | 191 |
6.1 | Unusual Data | 192 |
6.2 | Nonnormal Errors | 201 |
6.3 | Nonconstant Error Variance | 206 |
6.4 | Nonlinearity | 210 |
6.5 | Collinearity and Variable Selection | 216 |
6.6 | Diagnostics for Generalized Linear Models | 225 |
7 | Drawing Graphs | 235 |
7.1 | A General Approach to S Graphics | 236 |
7.2 | Putting it Together: Effect Displays | 247 |
7.3 | Graphics Devices | 255 |
8 | Writing Programs | 257 |
8.1 | Defining Functions | 258 |
8.2 | Working with Matrices | 261 |
8.3 | Program Control: Conditionals, Loops, and Recursion | 268 |
8.4 | Apply and its Relatives | 278 |
8.5 | Object-Oriented Programming in S | 283 |
8.6 | Writing S Programs | 292 |
References | 295 | |
Index of Data Sets | 299 | |
Index of Functions, Operators, Control Structures, and Other Symbols | 300 | |
Author Index | 305 | |
Subject Index | 306 | |
About the Author | 312 |
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