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)

Retrieving live data for markets and wallets with R6 classes

This section will explain how to create a simple requester, which is an object that requests external information (from an API over the internet in this case). We will also develop our exchange and wallet infrastructure.

Creating a very simple requester to isolate API calls

Now, we will focus on how we actually retrieve live data. This functionality will also be implemented using R6 classes, as the interactions can be complex. First of all, we create a simple Requester class that contains the logic to retrieve data from JSON APIs found elsewhere in the internet and that will be used to get our live cryptocurrency data for wallets and markets. We don't want logic...