readr: parse_number – R documentation

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parse_number

Parse numbers, flexibly

Description

This drops any non-numeric characters before or after the first number. The grouping mark specified by the locale is ignored inside the number.

Usage

parse_number(x, na = c("", "NA"), locale = default_locale(), trim_ws = TRUE)

col_number()

Arguments

`x`	Character vector of values to parse.
`na`	Character vector of strings to interpret as missing values. Set this option to `character()` to indicate no missing values.
`locale`	The locale controls defaults that vary from place to place. The default locale is US-centric (like R), but you can use `locale()` to create your own locale that controls things like the default time zone, encoding, decimal mark, big mark, and day/month names.
`trim_ws`	Should leading and trailing whitespace be trimmed from each field before parsing it?

Value

A numeric vector (double) of parsed numbers.

Examples

## These all return 1000
parse_number("$1,000")     ## leading $ and grouping character , ignored
parse_number("euro1,000")  ## leading non-numeric euro ignored

parse_number("1,234.56")
## explicit locale specifying European grouping and decimal marks
parse_number("1.234,56", locale = locale(decimal_mark = ",", grouping_mark = "."))
## SI/ISO 31-0 standard spaces for number grouping
parse_number("1 234.56", locale = locale(decimal_mark = ".", grouping_mark = " "))

## Specifying strings for NAs
parse_number(c("1", "2", "3", "NA"))
parse_number(c("1", "2", "3", "NA", "Nothing"), na = c("NA", "Nothing"))

readr

Read Rectangular Text Data

v1.4.0

GPL (>= 2) | file LICENSE

Authors

Hadley Wickham [aut], Jim Hester [aut, cre], Romain Francois [ctb], R Core Team [ctb] (Date time code adapted from R), RStudio [cph, fnd], Jukka Jylänki [ctb, cph] (grisu3 implementation), Mikkel Jørgensen [ctb, cph] (grisu3 implementation)

Initial release