Are you familiar with R programming but you never created your own R function? This book will help you create your own R functions, review the work of other programmers, and introduce you to the most useful R commands for R function programming. The book starts out by explaining what functions are, and relates the concept to methods learned in algebra class to make it easier to understand. It will also help you make better predictions with your data. This book is meant for individuals in data heavy career fields such as data analysts, statisticians, and data scientists looking to develop their own R functions.
If you would like to purchase a PDF version of the book here is the link: pdf version.