Extract format group strings or numbers — str_extract_fmt

These functions allow you to extract segments of information from within a result string by targetting specific format groups. str_extract_fmt_group() allows you to pull out the individual format group string, while str_extract_num() allows you to pull out that specific numeric result.

Usage

str_extract_fmt_group(string, format_group)

str_extract_num(string, format_group)

Arguments

string: A string of number results from which to extract format groups
format_group: An integer representing format group that should be extracted

Value

A character vector

Details

Format groups refer to individual segments of a string. For example, given the string ' 5 (34.4%) [9]', there are three separate format groups, which are ' 5', '(34.4%)', and '[9]'.

Examples


string <- c(" 0  (0.0%)", " 8  (9.3%)", "78 (90.7%)",  "-1 (-.56, .75) -523%, 56 | -34")

str_extract_fmt_group(string, 2)
#> [1] "(0.0%)"  "(9.3%)"  "(90.7%)" "(-.56," 

str_extract_num(string, 2)
#> [1]  0.00  9.30 90.70 -0.56