stri_match_regex: Extract Regex Pattern Matches, Together with Capture Groups

In stringi: THE string processing package for R

Description

These functions extract substrings of str that match a given pattern, and also give matches for capture groups, i.e. subpatterns given in round parentheses.

Usage

stri_match_all_regex(str, pattern, opts_regex = list())

stri_match_first_regex(str, pattern, opts_regex = list())

stri_match_last_regex(str, pattern, opts_regex = list())

Arguments

str	character vector of strings to search in
pattern	character vector of regular expressions to search for
opts_regex	a named list as generated with stri_opts_regex

Details

Vectorized over str and pattern.

Value

For stri_match_all_regex, a list of character matrices is returned. Otherwise, a character matrix is given. NA if not found or if given capture group is unavailable.

The first column gives the whole match. The second one corresponds to the first capture group, the third – the second capture group, and so on.

See Also

Other search_match: stri_match_all; stri_match_first; stri_match_last; stri_match; stringi-search

Other search_regex: stri_count_regex; stri_detect_regex; stri_extract_all_regex, stri_extract_all_regex, stri_extract_first_regex, stri_extract_first_regex, stri_extract_last_regex, stri_extract_last_regex; stri_locate_all_regex, stri_locate_all_regex, stri_locate_first_regex, stri_locate_first_regex, stri_locate_last_regex, stri_locate_last_regex; stri_opts_regex; stri_replace_all_regex, stri_replace_all_regex, stri_replace_first_regex, stri_replace_first_regex, stri_replace_last_regex, stri_replace_last_regex; stri_split_regex, stri_split_regex; stringi-search-regex; stringi-search

stringi documentation built on May 2, 2019, 4:54 p.m.