Regular expressions are powerful tools, of course, but also a slippery slope on which computer-friendly folks can easily spend more time than anyone must know. Consider the clip in Figure E.4 a friendly warning:
Consult the following links for additional resources on regular expressions.
For a proper definition, the historical background, and some key references on regular expressions:
E.4.2 Learning and training
Many online sites offer tutorials and ways of trying out your regex skills:
For using regular expressions in R:
?base::regexprovides documentation on Regular Expressions as used in R.
[70_regex.Rmd updated on 2022-05-16 17:14:40 by hn.]