qdapRegex (version 0.4.0)

rm_number: 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)

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 dict

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_".

x

a character vector to convert to a numeric vector.

...

Other arguments passed to gsub.

Value

• rm_number - Returns a character string with number removed. as_numeric2 - Returns a list of vectors of numbers. as_numeric2 - Returns a 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_angle, rm_bracket, rm_bracket_multiple, rm_curly, rm_round, rm_square; rm_between, rm_between_multiple; 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_twitter_url, rm_url; rm_white, rm_white_bracket, rm_white_colon, rm_white_comma, rm_white_endmark, rm_white_lead, rm_white_lead_trail, rm_white_multiple, rm_white_punctuation, rm_white_trail; 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)
rm_number(x, extract=TRUE)

##Convert to numeric
as_numeric(rm_number(x, extract=TRUE))   # retain list
as_numeric2(rm_number(x, extract=TRUE))  # unlist