When preparing for the SOA Exam C or CAS Exam 4C, mastering data cleaning with R is a game-changer. These exams demand not just an understanding of actuarial models but also the ability to handle real-world data that’s often messy and incomplete. Using R effectively for data cleaning helps you spend less time wrestling with data issues and more time on meaningful analysis and modeling. Let me walk you through how to harness R’s strengths to clean actuarial datasets efficiently and confidently.