Exploratory Data Analysis with R
Exploratory Data Analysis with R
About the Book
This book covers the essential exploratory techniques for summarizing data with R. These techniques are typically applied before formal modeling commences and can help inform the development of more complex statistical models. Exploratory techniques are also important for eliminating or sharpening potential hypotheses about the world that can be addressed by the data you have. We will cover in detail the plotting systems in R as well as some of the basic principles of constructing informative data graphics. We will also cover some of the common multivariate statistical techniques used to visualize high-dimensional data.
If you are interested in a printed copy of this book, you can purchase one at Lulu.
Some of the topics we cover are
- Making exploratory graphs
- Principles of analytic graphics
- Plotting systems and graphics devices in R
- The base and ggplot2 plotting systems in R
- Clustering methods
- Dimension reduction techniques
About the Author
Packages
The Book
This package contains just the book in PDF, EPUB, or MOBI formats.
PDF
EPUB
MOBI
WEB
English
The Book + Datasets + R Code Files
This package contains the book and R code files corresponding to each of the chapters in the book. The package also contains the datasets used in all of the chapters so that the code can be fully executed.
Includes:
Datasets
R Code Files
PDF
EPUB
MOBI
WEB
English
The Book + Lecture Videos (HD) + Datasets + R Code Files
This package includes the book, high definition lecture video files (720p) corresponding to each of the chapters, datasets and R code files for all chapters. The videos are licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International license.
Includes:
Datasets
R Code Files
Lecture Videos (HD)
PDF
EPUB
MOBI
WEB
English
Table of Contents
- 1. Stay in Touch!
- 2. Preface
-
3. Getting Started with R
- 3.1 Installation
- 3.2 Getting started with the R interface
-
4. Managing Data Frames with the
dplyrpackage- 4.1 Data Frames
-
4.2 The
dplyrPackage -
4.3
dplyrGrammar -
4.4 Installing the
dplyrpackage -
4.5
select() -
4.6
filter() -
4.7
arrange() -
4.8
rename() -
4.9
mutate() -
4.10
group_by() -
4.11
%>% - 4.12 Summary
-
5. Exploratory Data Analysis Checklist
- 5.1 Formulate your question
- 5.2 Read in your data
- 5.3 Check the packaging
-
5.4 Run
str() - 5.5 Look at the top and the bottom of your data
- 5.6 Check your “n”s
- 5.7 Validate with at least one external data source
- 5.8 Try the easy solution first
- 5.9 Challenge your solution
- 5.10 Follow up questions
-
6. Principles of Analytic Graphics
- 6.1 Show comparisons
- 6.2 Show causality, mechanism, explanation, systematic structure
- 6.3 Show multivariate data
- 6.4 Integrate evidence
- 6.5 Describe and document the evidence
- 6.6 Content, Content, Content
- 6.7 References
-
7. Exploratory Graphs
- 7.1 Characteristics of exploratory graphs
- 7.2 Air Pollution in the United States
- 7.3 Getting the Data
- 7.4 Simple Summaries: One Dimension
- 7.5 Five Number Summary
- 7.6 Boxplot
- 7.7 Histogram
- 7.8 Overlaying Features
- 7.9 Barplot
- 7.10 Simple Summaries: Two Dimensions and Beyond
- 7.11 Multiple Boxplots
- 7.12 Multiple Histograms
- 7.13 Scatterplots
- 7.14 Scatterplot - Using Color
- 7.15 Multiple Scatterplots
- 7.16 Summary
-
8. Plotting Systems
- 8.1 The Base Plotting System
- 8.2 The Lattice System
- 8.3 The ggplot2 System
- 8.4 References
-
9. Graphics Devices
- 9.1 The Process of Making a Plot
- 9.2 How Does a Plot Get Created?
- 9.3 Graphics File Devices
- 9.4 Multiple Open Graphics Devices
- 9.5 Copying Plots
- 9.6 Summary
-
10. The Base Plotting System
- 10.1 Base Graphics
- 10.2 Simple Base Graphics
- 10.3 Some Important Base Graphics Parameters
- 10.4 Base Plotting Functions
- 10.5 Base Plot with Regression Line
- 10.6 Multiple Base Plots
- 10.7 Summary
-
11. Plotting and Color in R
- 11.1 Colors 1, 2, and 3
- 11.2 Connecting colors with data
- 11.3 Color Utilities in R
-
11.4
colorRamp() -
11.5
colorRampPalette() - 11.6 RColorBrewer Package
- 11.7 Using the RColorBrewer palettes
-
11.8 The
smoothScatter()function - 11.9 Adding transparency
- 11.10 Summary
-
12. Hierarchical Clustering
- 12.1 Hierarchical clustering
- 12.2 How do we define close?
- 12.3 Example: Euclidean distance
- 12.4 Example: Manhattan distance
- 12.5 Example: Hierarchical clustering
- 12.6 Prettier dendrograms
- 12.7 Merging points: Complete
- 12.8 Merging points: Average
-
12.9 Using the
heatmap()function - 12.10 Notes and further resources
-
13. K-Means Clustering
- 13.1 Illustrating the K-means algorithm
- 13.2 Stopping the algorithm
-
13.3 Using the
kmeans()function - 13.4 Building heatmaps from K-means solutions
- 13.5 Notes and further resources
-
14. Dimension Reduction
- 14.1 Matrix data
- 14.2 Patterns in rows and columns
- 14.3 Related problem
- 14.4 SVD and PCA
- 14.5 Unpacking the SVD: u and v
- 14.6 SVD for data compression
- 14.7 Components of the SVD - Variance explained
- 14.8 Relationship to principal components
- 14.9 What if we add a second pattern?
- 14.10 Dealing with missing values
- 14.11 Example: Face data
- 14.12 Notes and further resources
-
15. The ggplot2 Plotting System: Part 1
-
15.1 The Basics:
qplot() - 15.2 Before You Start: Label Your Data
- 15.3 ggplot2 “Hello, world!”
- 15.4 Modifying aesthetics
- 15.5 Adding a geom
- 15.6 Histograms
- 15.7 Facets
- 15.8 Case Study: MAACS Cohort
- 15.9 Summary of qplot()
-
15.1 The Basics:
-
16. The ggplot2 Plotting System: Part 2
- 16.1 Basic Components of a ggplot2 Plot
- 16.2 Example: BMI, PM2.5, Asthma
- 16.3 Building Up in Layers
- 16.4 First Plot with Point Layer
- 16.5 Adding More Layers: Smooth
- 16.6 Adding More Layers: Facets
- 16.7 Modifying Geom Properties
- 16.8 Modifying Labels
- 16.9 Customizing the Smooth
- 16.10 Changing the Theme
- 16.11 More Complex Example
- 16.12 A Quick Aside about Axis Limits
- 16.13 Resources
-
17. Data Analysis Case Study: Changes in Fine Particle Air Pollution in the U.S.
- 17.1 Synopsis
- 17.2 Loading and Processing the Raw Data
- 17.3 Results
- 18. About the Author
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