Regular Expressions in R: Learn regular expressions fast! In five hours develop advanced skills to find complex patterns, improve string manipulations, ... sophisticated filters. (Tiny R Book 4) by Yarberry Bill

Author:Yarberry, Bill [Yarberry, Bill]
Language: eng
Format: azw3
Published: 2020-04-21T16:00:00+00:00

Chapter#8: Regular expressions in stringr[34]

You can use the following prebuilt classes in the package stringr:

[:punct:]: punctuation.

[:alpha:]: letters.

[:lower:]: lowercase letters.

[:upper:]: uppercase letters.

[:digit:]: digits.

[:xdigit:]: hex digits.

[:alnum:]: letters and numbers.

[:cntrl:]: control characters.

[:graph:]: letters, numbers, and punctuation.

[:print:]: letters, numbers, punctuation, and whitespace.

[:space:]: space characters (basically equivalent to \s).

[:blank:]: space and tab.

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