rm_number {qdapRegex}R Documentation

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_phrase, rm_caps, rm_citation_tex, rm_citation, rm_city_state_zip, rm_city_state, 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
[Package qdapRegex version 0.7.2 Index]