The author of this book is not the creator of any of the packages, functions, or programs used in each of the examples; I am only a facilitator. For that reason, I would like to sincerely thank the developers of R and the R Packages, who have contributed so generously to the growing of the R open source community. In this book, we use many packages and sometimes the definitions of these packages. In order to be respectful to the authors, they are written verbatim.

This appendix provides a list of links referenced in the book, which are sorted chapter-wise.

Hyperlinks provide a gateway to extensive literature that can be accessed on the Internet. They provide information above and beyond what one finds in a single article, book, blog, or other media formats. However, when one writes a book, the links provided in the printed book are useful to only those readers who would go to any lengths to find information, but for others, these links are irksome, frustrating, and almost useless. They are of course useful in online formats such as e-books.

In order to conform to page-count limits set by the publishers and yet provide guidance to the readers, there is no better way than publishing a list of links that is sorted chapter-wise and placed in a location that is easy to access. This appendix is an attempt to do just that. However, some essential information is used in the book in some chapters.