The author of this book is not the creator of any of the packages, functions, or programs used in any of the examples, he is only a facilitator.
For that reason, I would like to sincerely thank the developers of R and R packages, who have contributed so generously to the growing of the R open source community. In this book, we used many packages. Sometimes, the definitions of these packages, in order to be respectful to the authors, are written literally. The Appendix at the end of the book contains all sources as special thanks to the authors.
I would like to thank my data mining professor PhD Oldemar Rodriguez Rojas, who inspired me and taught me so much.
I would also like to thank my publisher, Packt Publishing, for giving me the opportunity to work on this book. I would like to thank all the technical reviewers and content development editors at Packt Publishing for their informative comments and suggestions.
I would like to thank Felix Alpizar Lobo and Irene Gallegos Gurdian from Banco Improsa for all their support and mentoring.
Finally, I would like to thank my amazing wife, Silvia, without her encouragement, support, and patience, this book would not have been possible.