Book Image

Modern R Programming Cookbook

By : Jaynal Abedin
Book Image

Modern R Programming Cookbook

By: Jaynal Abedin

Overview of this book

R is a powerful tool for statistics, graphics, and statistical programming. It is used by tens of thousands of people daily to perform serious statistical analyses. It is a free, open source system whose implementation is the collective accomplishment of many intelligent, hard-working people. There are more than 2,000 available add-ons, and R is a serious rival to all commercial statistical packages. The objective of this book is to show how to work with different programming aspects of R. The emerging R developers and data science could have very good programming knowledge but might have limited understanding about R syntax and semantics. Our book will be a platform develop practical solution out of real world problem in scalable fashion and with very good understanding. You will work with various versions of R libraries that are essential for scalable data science solutions. You will learn to work with Input / Output issues when working with relatively larger dataset. At the end of this book readers will also learn how to work with databases from within R and also what and how meta programming helps in developing applications.
Table of Contents (10 chapters)

Defining a new S3 class

In OOP, the class and method play an important role. The behavior of a generic function depends on the class and the methods dispatched on it. In this recipe, you will create a new S3 class for an object in R.

Getting ready

The S3 class is the most popular class in R. Primarily, the majority of R objects come with default S3 classes. There is no rigid definition of S3 classes in R. Rather it is simple and intuitive to use. In this recipe, you will create a new S3 class, say robustSummary, for a numeric vector. Let's say you have a numeric vector of the default class numeric, but your objective is to create a new class robustSummary and attach it to the object.

Here is the given numeric object with...