数据科学（影印版）

Preface
Part I． Explore
1． Data Visualization with ggplot2
Introduction
First Steps
Aesthetic Mappings
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Preface
Part I． Explore
1． Data Visualization with ggplot2
Introduction
First Steps
Aesthetic Mappings
Common Problems
Facets
Geometric Objects
Statistical Transformations
Position Adjustments
Coordinate Systems
The Layered Grammar of Graphics
2． Workflow： Basics
Coding Basics
What's in a Name?
Calling Functions
3． Data Transformation with dplyr
Introduction
Filter Rows with filter（）
Arrange Rows with arrange（）
Select Columns with select（）
Add New Variables with mutate（）
Grouped Summaries with summarize（）
Grouped Mutates （and Filters）
4． W0rkfl0w： Scripts
Running Code
RStudio Diagnostics
5． Exploratory Data Analysis
Introduction
Questions
Variation
Missing Values
Covariation
Patterns and Models
ggplot2 Calls
Learning More
6． Workflow： Projects
What Is Real?
Where Does Your Analysis Live?
Paths and Directories
RStudio Projects
Summary
Part II． Wrangle
7． Tibbles with tibble
Introduction
Creating Tibbles
Tibbles Versus data．frame
Interacting with Older Code
8． Data Import with readr
Introduction
Getting Started
Parsing a Vector
Parsing a File
Writing to a File
Other Types of Data
9． Tidy Data with tidyr
Introduction
Tidy Data
Spreading and Gathering
Separating and Pull
Missing Values
Case Study
Nontidy Data
10． Relational Data with dplyr
Introduction
nycflightsl3
Keys
Mutating loins
Filtering loins
loin Problems
Set Operations
11． Strings with stringr
Introduction
String Basics
Matching Patterns with Regular Expressions
Tools
Other Types of Pattern
Other Uses of Regular Expressions
stringi
12． Factors with forcats
Introduction
Creating Factors
General Social Survey
Modifying Factor Order
Modifying Factor Levels
13． Dates and Times with lubridate
Introduction
Creating Date/Times
Date-Time Components
Time Spans
Time Zones
Part III． Program
14． Pipeswith magrittr
Introduction
Piping Alternatives
When Not to Use the Pipe
Other Tools from magrittr
15． Functions
Introduction
When Should You Write a Function?
Functions Are for Humans and Computers
Conditional Execution
Function Arguments
Return Values
Environment
16． Vectors
Introduction
Vector Basics
Important Types of Atomic Vector
Using Atomic Vectors
Recursive Vectors （Lists）
Attributes
Augmented Vectors
17． Iteration with purrr
Introduction
For Loops
For Loop Variations
For Loops Versus Functionals
The Map Functions
Dealing with Failure
Mapping over Multiple Arguments
Walk
Other Patterns of For Loops
Part IV． Model
18． Model Basics with modelr
Introduction
A Simple Model
Visualizing Models
Formulas and Model Families
Missing Values
Other Model Families
19． Model Building
Introduction
Why Are Low-Quality Diamonds More Expensive?
What Affects the Number of Daily Flights?
Learning More About Models
20． Many Models with purrr and broom
Introduction
gapminder
List-Columns
Creating List-Columns
Simplifying List-Columns
Making Tidy Data with broom
Part V． Communicate
21． R Markdown
Introduction
R Markdown Basics
Text Formatting with Markdown
Code Chunks
Troubleshooting
YAML Header
Learning More
22． Graphics for Communication with ggplot2
Introduction
Label
Annotations
Scales
Zooming
Themes
Saving Your Plots
Learning More
23． R Markdown Formats
Introduction
Output Options
Documents
Notebooks
Presentations
Dashboards
Interactivity
Websites
Other Formats
Learning More
24． R Markdown Workflow
Index
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