R: Extract numbers from a string.

extract_numbers {filesstrings}

R Documentation

Extract numbers from a string.

Description

See strex::str_extract_numbers().

Usage

extract_numbers(string, leave_as_string = FALSE, decimals = FALSE,
  leading_decimals = FALSE, negs = FALSE)

nth_number(string, n, leave_as_string = FALSE, decimals = FALSE,
  leading_decimals = FALSE, negs = FALSE)

first_number(string, leave_as_string = FALSE, decimals = FALSE,
  leading_decimals = FALSE, negs = FALSE)

last_number(string, leave_as_string = FALSE, decimals = FALSE,
  leading_decimals = FALSE, negs = FALSE)

Arguments

`string`	A string.
`leave_as_string`	Do you want to return the number as a string (`TRUE`) or as numeric (`FALSE`, the default)?
`decimals`	Do you want to include the possibility of decimal numbers (`TRUE`) or not (`FALSE`, the default).
`leading_decimals`	Do you want to allow a leading decimal point to be the start of a number?
`negs`	Do you want to allow negative numbers? Note that double negatives are not handled here (see the examples).
`n`	The index of the number (or non-numeric) that you seek. Negative indexing is allowed i.e. `n = 1` (the default) will give you the first number (or non-numeric) whereas `n = -1` will give you the last number (or non-numeric), `n = -2` will give you the second last number and so on. The function is vectorized over this argument.

[Package filesstrings version 3.0.0 Index]