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ggplot2 Essentials

ggplot2 Essentials

By : Donato Teutonico
3.8 (5)
Buy this Book
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ggplot2 Essentials

ggplot2 Essentials

3.8 (5)
By: Donato Teutonico
Buy this Book

Overview of this book

This book is perfect for R programmers who are interested in learning to use ggplot2 for data visualization, from the basics up to using more advanced applications, such as faceting and grouping. Since this book will not cover the basics of R commands and objects, you should have a basic understanding of the R language.
Table of Contents (9 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Graphics in R
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1. Graphics in R
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Getting ggplot2 up and running
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The Integrated Development Environment
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The plotting environments in R
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Standard graphics and grid-based graphics
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Graphics and standard plots
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Lattice and Trellis plots
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ggplot2 and the grammar of graphics
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Further reading
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Summary
2
2. Getting Started
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2. Getting Started
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General aspects
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Histograms and density plots
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Bar charts
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Boxplots
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Scatterplots
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Time series
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Bubble charts and dot plots
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Further reading
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Summary
3
3. The Layers and Grammar of Graphics
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3. The Layers and Grammar of Graphics
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Components of layered grammar
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Creating a plot layer by layer with the ggplot function
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Scales
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The coordinate system
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Faceting
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Layers in ggplot2
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Equivalent coding between qplot and ggplot
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Further reading
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Summary
4
4. Advanced Plotting Techniques
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4. Advanced Plotting Techniques
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Adding statistics
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Advanced aesthetic mapping
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Plots with polar coordinates
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Further reading
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Summary
5
5. Controlling Plot Details
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5. Controlling Plot Details
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Exploring scales
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The plot title and axis labels
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Axis scales
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Legends
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Themes
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Further reading
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Summary
6
6. Plot Output
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6. Plot Output
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Multiple plots in one page
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Saving plots to a file
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Further reading
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Summary
7
7. Special Applications of ggplot2
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7. Special Applications of ggplot2
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Plotting maps with ggplot2 and ggmap
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Scatterplot matrix with GGally
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Plotting heatmaps with ggplot2
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Further reading
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Summary
8
Index
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Index

Plotting maps with ggplot2 and ggmap

In ggplot2, it is possible to include maps as well as map data within a plot. This can be done thanks to certain ggplot2 functions that allow the combination of typical ggplot2 elements with data from the maps package. Alternatively, ggmap, a dedicated R package, was developed by David Kahle and Hadley Wickham and enables the easy inclusion of map data in ggplot2 graphs using map data provided on the Internet.

Mapping representations with ggplot2 and maps

The maps package is an R package that contains cartographic data for some individual countries as well as for the entire world, including example datasets that can be used to combine data to map representations. The limitation of this data is related to the limited maps available, consequently limiting the plots that can be realized with this approach. In addition to this, you should also keep in mind that these maps may be quite outdated. The maps currently available in the package are as follows:

  • world...

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Tech Concepts
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Programming languages
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ggplot2 Essentials
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