stri_detect_regex: Detect a Regex Pattern Match

In stringi: THE string processing package for R

Description

This function checks if there is at least one match to a regex pattern in a string.

Usage

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

Arguments

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

Details

Unless you are very lazy, please call the underlying functions directly for better performance.

Vectorized over str and pattern.

If pattern is empty, then the result is NA and a warning is generated.

Value

Returns a logical vector.

See Also

Other search_detect: stri_detect_charclass; stri_detect_fixed; stri_detect; stringi-search

Other search_regex: stri_count_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_match_all_regex, stri_match_all_regex, stri_match_first_regex, stri_match_first_regex, stri_match_last_regex, stri_match_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

Examples

## Not run: 
stri_detect_regex(c("stringi w R","REXAMINE","123"), 'R.')
stri_detect_regex(c("stringi w R","REXAMINE","123"), '[[:alpha:]]*?')
stri_detect_regex(c("stringi w R","REXAMINE","123"), '[a-zC1]')
stri_detect_regex(c("stringi w R","REXAMINE","123"), '( R|RE)')
stri_detect_regex("stringi", "STRING.", opts_regex=stri_opts_regex(case_insensitive=TRUE))

## End(Not run)

Example output

[1] FALSE  TRUE FALSE
[1] TRUE TRUE TRUE
[1]  TRUE FALSE  TRUE
[1]  TRUE  TRUE FALSE
[1] TRUE

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