CRAN Recipes

1: DPLYR.- 2: STRINGR.- 3: Lubridate.- 4: Regular Expressions: Introduction.- 5: Typical Uses.- 6: Some Simple Patterns.- 7: Character Classes.- 8: Elements of Regular Expressions.- 9: The Magnificent Seven.- 10: Regular Expressions in Stringr.- 11: Unicode.- 12: Tools for Development and Resources.- 13: Regex Summary.- 14: Recipes for Common R Tasks.- 15: Data Structures.- 16: Visualization.- 17: Simple Prediction Methods.- 18: Smorgasbord of Simple Statistical Tests.- 19: Validation of Data.- 20: Shortcuts and Miscellaneous.- 21: Conclusion.- Appendix A: Suggested Websites.- Appendix B: Cheat Sheet for Regex in R.- Appendix C: General R Comments by John D. Cook, Consultant.- Appendix D: Understanding a Long Regular Expression.- Appendix E: Regular Expression-enabled Languages.- Appendix F: Sample Data Analysis Questions.- Appendix G: Formats Recognized by Lubridate.

William A. Yarberry, Jr., CPA, CISA, is principal consultant, ICCM Consulting LLC, based in Houston, Texas. His practice is focused on IT governance, Sarbanes-Oxley compliance, security consulting, and business analytics for cost management. He was previously a senior manager with PricewaterhouseCoopers, responsible for telecom and network services in the Southwest region. Yarberry has more than 30 years' experience in a variety of IT-related services, including application development, internal audit management, outsourcing administration, and Sarbanes-Oxley consulting.

His books include The Effective CIO (co-authored), Computer Telephony Integration, $250K Consulting, DPLYR, 50,000 Random Numbers, Telecommunications Cost Management, and GDPR: A Short Primer. In addition, he has written over 20 professional articles on topics ranging from wireless security to change management. One of his articles, "Audit Rights in anOutsource Environment," received the Institute of Internal Auditors Outstanding Contributor Award.

Prior to joining PricewaterhouseCoopers, Yarberry was director of telephony services for Enron Corporation. He was responsible for operations, planning, and architectural design for voice communications servers and related systems for more than 7,000 employees. Yarberry graduated Phi Beta Kappa in chemistry from the University of Tennessee and earned an MBA at the University of Memphis. He enjoys reading history, swimming, hiking, and spending time with family.