Demystifying Regular Expressions in R

Introduction In this post, we will learn about using regular expressions in R. While it is aimed at absolute beginners, we hope experienced users will find it useful as well. The post is broadly divided into 3 sections. In the first section, we will introduce the pattern matching functions such as grep, grepl etc. in base R as we will be using them in the rest of the post. Once the reader is comfortable with the above mentioned pattern matching functions, we will learn about regular expressions while exploring the names of R packages by probing the following: