stri_extract_charclass: Extract Character Class Matches
In stringi: THE string processing package for R

Description Usage Arguments Details Value See Also Examples

These functions extract substrings of str that match a given pattern.

Generally, this is the way to extract single characters, only. Longer substrings, however, may be extracted, with the stri_extract_all_charclass function and merge=TRUE.

stri_extract_all_charclass(str, pattern, merge = TRUE)

stri_extract_first_charclass(str, pattern)

stri_extract_last_charclass(str, pattern)

`str`	character vector to search in
`pattern`	character vector; identifiers of character classes, see stringi-search-charclass
`merge`	logical [`stri_extract_all_charclass` only]; should consecutive matches be merged into one string?

Vectorized over str, pattern, and merge.

For stri_extract_all_charclass, a list of max(length(str), length(pattern), length(merge)) character vectors is returned. Otherwise, you get a character vector. NA if not found.

Other search_charclass: stri_count_charclass; stri_detect_charclass; stri_locate_all_charclass, stri_locate_all_charclass, stri_locate_first_charclass, stri_locate_first_charclass, stri_locate_last_charclass, stri_locate_last_charclass; stri_replace_all_charclass, stri_replace_all_charclass, stri_replace_first_charclass, stri_replace_first_charclass, stri_replace_last_charclass, stri_replace_last_charclass; stri_split_charclass, stri_split_charclass; stri_trim, stri_trim, stri_trim_both, stri_trim_left, stri_trim_right; stringi-search-charclass; stringi-search

Other search_extract: stri_extract_all_fixed, stri_extract_all_fixed,, stri_extract_first_fixed, stri_extract_first_fixed,, stri_extract_last_fixed, stri_extract_last_fixed; 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_extract_all; stri_extract_first; stri_extract_last; stri_extract; stringi-search

stri_extract_all_charclass(c('AbcdeFgHijK', 'abc', 'ABC'), 'Ll')
stri_extract_all_charclass(c('AbcdeFgHijK', 'abc', 'ABC'), 'Ll', merge=FALSE)
stri_extract_first_charclass('AaBbCc', 'Ll')
stri_extract_last_charclass('AaBbCc', 'Ll')