rm_number: Remove/Replace/Extract Numbers

In qdapRegex: Regular Expression Removal, Extraction, and Replacement Tools

Remove/Replace/Extract Numbers

Description

rm_number - Remove/replace/extract number from a string (works on numbers with commas, decimals and negatives).

as_numeric - A wrapper for as.numeric(gsub(",", "", x)), which removes commas and converts a list of vectors of strings to numeric. If the string cannot be converted to numeric NA is returned.

as_numeric2 - A convenience function for as_numeric that unlists and returns a vector rather than a list.

Usage

rm_number(
  text.var,
  trim = !extract,
  clean = TRUE,
  pattern = "@rm_number",
  replacement = "",
  extract = FALSE,
  dictionary = getOption("regex.library"),
  ...
)

as_numeric(x)

as_numeric2(x)

ex_number(
  text.var,
  trim = !extract,
  clean = TRUE,
  pattern = "@rm_number",
  replacement = "",
  extract = TRUE,
  dictionary = getOption("regex.library"),
  ...
)

Arguments

text.var	The text variable.
trim	logical. If TRUE removes leading and trailing white spaces.
clean	trim logical. If TRUE extra white spaces and escaped character will be removed.
pattern	A character string containing a regular expression (or character string for fixed = TRUE) to be matched in the given character vector. Default, @rm_number uses the rm_number regex from the regular expression dictionary from the dictionary argument.
replacement	Replacement for matched pattern.
extract	logical. If TRUE the numbers are extracted into a list of vectors.
dictionary	A dictionary of canned regular expressions to search within if pattern begins with "@rm_".
...	Other arguments passed to gsub.
x	a character vector to convert to a numeric vector.

Value

rm_number - Returns a character string with number removed.

as_numeric - Returns a list of vectors of numbers.

as_numeric2 - Returns an unlisted vector of numbers.

References

The number regular expression was created by Jason Gray.

See Also

gsub, stri_extract_all_regex

Other rm_ functions: rm_abbreviation(), rm_between(), rm_bracket(), rm_caps(), rm_caps_phrase(), rm_citation(), rm_citation_tex(), rm_city_state(), rm_city_state_zip(), rm_date(), rm_default(), rm_dollar(), rm_email(), rm_emoticon(), rm_endmark(), rm_hash(), rm_nchar_words(), rm_non_ascii(), rm_non_words(), rm_percent(), rm_phone(), rm_postal_code(), rm_repeated_characters(), rm_repeated_phrases(), rm_repeated_words(), rm_tag(), rm_time(), rm_title_name(), rm_url(), rm_white(), rm_zip()

Examples

x <- c("-2 is an integer.  -4.3 and 3.33 are not.",
    "123,456 is 0 alot -123456 more than -.2", "and 3456789123 fg for 345.",
    "fg 12,345 23 .44 or 18.", "don't remove this 444,44", "hello world -.q")

rm_number(x)
ex_number(x)

##Convert to numeric
as_numeric(ex_number(x))   # retain list
as_numeric2(ex_number(x))  # unlist

qdapRegex documentation built on April 4, 2025, 4:35 a.m.