Regular Expressions

For bioinformatics, it is critical to know how to use at least the basics of regular expressions (regex). There are regex that you use all the time, but most of us will look them up more often than not. Following are some links to online tutorials and cheatsheets to guide you the next time you need to use them (it will probably be sooner than you think!

Tutorials and Cheatsheets

RexEgg Tutorial

RexEgg Cheat Sheets

RegexOne: an interactive tutorial

Regular-Expressions.info. The name says it all! Also has links for grep and other languages (see below).

Ryans Tutorials

A very basic regex cheatsheet

A more thorough cheatsheet

grep: find anything

the command line program grep, which stands for global regular expression print, can search files and folders for patterns, which includes regular expressions.

Regex.info site

Using regular expressions in grep

grep tutorial

Ryans Tutorial on grep and regex

Intro to grep

Links for other languages

RexEgg for Python

regex.info for Python

regex for Python cheatsheet

R documentation for regex

A fairly comprehensive regex primer for the R language

RStudio.com regex cheatsheet (pdf)

For R tidyverse users, here is a link to R for Data Science chapter section on regex, and here is the stringr package regex page.