Matching Lines That Start With `#*` in R Using grep()

Substituting Labels with First Characters Using Regular Expressions in R

Using regex to Group Similar Expressions in a Dataset Without Prior Knowledge of Those Groups Using R's stringr and qdap Packages

Understanding Special Characters in Regular Expressions: A Guide to Flavors and Escapes

Escaping Backslashes in LaTeX Files: A Guide to Working with Special Characters in R

Mastering Regular Expressions in R for Powerful String Manipulation