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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)
Buy this Book

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
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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 1. Base Graphics in R – One Step at a Time

The goal of this chapter is to give you a comprehensive introduction to base graphics in R. By base graphics, I mean graphics created in R without the use of any additional software or contributed packages. In other words, for the time being, we are using only the default packages in R. After reading this chapter, you should be able to create some nice graphs. Therefore, in this chapter I will introduce you to the basic syntax and techniques used to create and save scatterplots and line plots, though many of the techniques here will be useful for other kinds of graph. We will begin with some basic graphs and then work our way to more complex graphs that include several lines and have axes and axis labels of your choice.

In this chapter, we will cover the following topics:

  • Basic graphics methods and syntax
  • Creating scatterplots and line plots
  • Creating special axes
  • Adding text—legends, titles, and axis labels
  • Adding lines—interpolation lines, regression lines, and curves
  • Graphing several variables, multiple plots, and multiple axes
  • Saving your graphs as PDF, PostScript, JPG files, and so on
  • Including mathematical expressions in your graphs
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Programming languages
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R Graph Essentials
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