This book is for those who wish to develop software in R. You don't need to be an expert or professional programmer to follow this book, but you do need to be interested in learning how R works. My hope is that this book is useful for people ranging from beginners to advanced by providing hands-on examples that may help you understand R in ways you previously did not.
I assume basic programming, mathematical, and statistical knowledge, because there are various parts in the book where concepts from these disciplines will be used, and they will not be explained in detail. If you have programmed something yourself in any programming language, know basic linear algebra and statistics, and know what linear regression is, you have everything you need to understand this book.
This book was written for people in a variety of contexts and with diverse profiles. For example, if you are an analyst employed by an organization that requires you to do frequent data processing to produce reports on a regular basis, and you need to develop programs to automate such tasks, this book is for you. If you are an academic researcher who wants to use current techniques, combine them, and develop tools to test them automatically, this book is for you. If you're a professional programmer looking for ways to take advantage of advanced R features, this book is for you. Finally, if you're preparing for a future in which data will be of paramount importance (it already is), this book is for you.
