Book Image

R Programming By Example

By : Omar Trejo Navarro
Book Image

R Programming By Example

By: Omar Trejo Navarro

Overview of this book

R is a high-level statistical language and is widely used among statisticians and data miners to develop analytical applications. Often, data analysis people with great analytical skills lack solid programming knowledge and are unfamiliar with the correct ways to use R. Based on the version 3.4, this book will help you develop strong fundamentals when working with R by taking you through a series of full representative examples, giving you a holistic view of R. We begin with the basic installation and configuration of the R environment. As you progress through the exercises, you'll become thoroughly acquainted with R's features and its packages. With this book, you will learn about the basic concepts of R programming, work efficiently with graphs, create publication-ready and interactive 3D graphs, and gain a better understanding of the data at hand. The detailed step-by-step instructions will enable you to get a clean set of data, produce good visualizations, and create reports for the results. It also teaches you various methods to perform code profiling and performance enhancement with good programming practices, delegation, and parallelization. By the end of this book, you will know how to efficiently work with data, create quality visualizations and reports, and develop code that is modular, expressive, and maintainable.
Table of Contents (12 chapters)

Building our presentation with R Markdown

In this section, we will develop our presentation's R Markdown file. We create an empty file named presentation.R and put the following headers in. The quotation marks are not required unless you want to include a colon in the title. As shown in a previous section, using backticks (“ ’), we can execute R code. In this case, we put the current date automatically in the front page. Finally, we chose ioslides_presentation as an output format. Feel free to experiment with the other outputs shown previously:

---
title:  "The Food Factory"
author: "Weekly Update"
date:   "`r Sys.Date()`"
output: ioslides_presentation
---

The following code sets up the default configuration for the code chunks in our presentation. We avoid showing code in the presentation with echo = FALSE and make each picture...