About the Authors

AshishSingh Bhatia is a reader and learner at his core. He has more than 11 years of rich experience in different IT sectors, encompassing training, development, and management. He has worked in many domains, such as software development, ERP, banking, and training. He is passionate about Python and Java, and recently he has been exploring R. He is mostly involved in web and mobile developments in various capacity. He always likes to explore new technologies and share his views and thoughts through various online medium and magazines. He believes in sharing his experience with new generation and do take active part in training and teaching also.

First and foremost, I would like to thank God almighty. I would like to thank my father, mother, brother and friends. I am also thankful to whole team at PacktPub especially Divya and Trusha. My special thanks go to my mother Smt. Ravindrakaur Bhatia for guiding and motivating me when its required most. I also want to take this opportunity to show my gratitude for Mitesh Soni, he is the one who introduced me to Packt and started the ball rolling.

Thanks to all who are directly or indirectly involved in this endeavor.

Yu-Wei, Chiu (David Chiu) is the founder of LargitData Company. He has previously worked for Trend Micro as a software engineer, with the responsibility of building up big data platforms for business intelligence and customer relationship management systems. In addition to being a startup entrepreneur and data scientist, he specializes in using Spark and Hadoop to process big data and apply data mining techniques to data analysis. Yu-Wei is also a professional lecturer, and has delivered talks on Python, R, Hadoop, and tech talks at a variety of conferences.

In 2013, Yu-Wei reviewed Bioinformatics with R Cookbook, a book compiled for Packt Publishing.

He feels immense gratitude to his family and friends for supporting and encouraging him to complete this book. Here, he sincerely says thanks to his mother, Ming-Yang Huang (Miranda Huang); his mentor, Man-Kwan Shan; proofreader of this book, Brendan Fisher; Taiwan R User Group; Data Science Program (DSP); and more friends who have offered their support.