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  • Book Overview & Buying R Graph Essentials
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R Graph Essentials

R Graph Essentials

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R Graph Essentials

R Graph Essentials

4.5 (4)
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Overview of this book

This book is targeted at R programmers who want to learn the graphing capabilities of R. This book will presume that you have working knowledge of R.
Table of Contents (6 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
Lock Free Chapter
1
1. Base Graphics in R – One Step at a Time
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1. Base Graphics in R – One Step at a Time
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Learning basic graphics techniques
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Creating and joining points
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Creating scatterplots and line plots
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Colors in R
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Passing parameter values to titles and labels
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Including a regression line
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Graphing mathematical functions
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R provides many options
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Creating graphs with several curves
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Customizing your axes
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Creating axis labels
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Creating multiple graphs on the same page
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Saving your graphs
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Including mathematical expressions on your plots
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Summary
2
2. Advanced Functions in Base Graphics
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2. Advanced Functions in Base Graphics
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Reading datasets into R
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Including a regression line and residuals
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A medical dataset to create graphs
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Creating complex multiple axes
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Including a grid on your graph
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Shading and coloring your graph
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Creating bar charts
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R's color palettes
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Using smoothers on your graph
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Creating scatterplot matrices
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Summary
3
3. Mastering the qplot Function
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3. Mastering the qplot Function
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About qplot
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The qplot syntax
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Producing scatterplots using qplot
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Subsetting your data before graphing
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Mapping aesthetics to categorical variables
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Controlling colors on your graph
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Setting up graphs as objects
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Creating facet plots
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Creating line graphs using qplot
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Creating multiple curves simultaneously
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Including smoothed curves
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Creating histograms with qplot
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Creating facet plots for histograms
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Creating kernel density plots
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Creating bar charts
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Creating boxplots
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Creating graphs with dates
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Summary
4
4. Creating Graphs with ggplot
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4. Creating Graphs with ggplot
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Getting started with ggplot
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Mapping color, shape, and size to a variable
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Creating attractive color schemes
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Creating curves for each factor level
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Creating histograms
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Creating bar charts
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Creating boxplots
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Labeling points with text
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Including regression lines
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Summary
5
Index
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Index

Chapter 4. Creating Graphs with ggplot

In the previous chapter, you learned a variety of useful techniques to produce high-quality graphs using qplot. In this chapter, you will learn how to create graphs using ggplot, an even more powerful graphics tool than qplot. In a book of this scope, it is impossible to cover all that ggplot has to offer. Thus, here we learn only the basic methods of ggplot. After reading this chapter, you should be able to create interesting graphics using ggplot. If you wish to read further about ggplot, links to other literature are given in this chapter. The topics covered in this chapter include the following:

  • Setting up variables for plotting
  • Adding color, symbol type, size, and shape as layers
  • Controlling plotting backgrounds and margins
  • Creating line graphs, histograms, bar chats, and boxplots
  • Using attractive color schemes

By the end of this chapter, you should understand the basic principles behind the creation of graphics in ggplot, and will be able...

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