| stri_extract_all_boundaries {stringi} | R Documentation |
These functions extract text between specific text boundaries.
stri_extract_all_boundaries(str, simplify = FALSE, omit_no_match = FALSE, ..., opts_brkiter = NULL) stri_extract_last_boundaries(str, ..., opts_brkiter = NULL) stri_extract_first_boundaries(str, ..., opts_brkiter = NULL) stri_extract_all_words(str, simplify = FALSE, omit_no_match = FALSE, locale = NULL) stri_extract_first_words(str, locale = NULL) stri_extract_last_words(str, locale = NULL)
str |
character vector or an object coercible to |
simplify |
single logical value;
if |
omit_no_match |
single logical value; if |
... |
additional settings for |
opts_brkiter |
a named list with ICU BreakIterator's settings
as generated with |
locale |
|
Vectorized over str.
For more information on the text boundary analysis
performed by ICU's BreakIterator, see
stringi-search-boundaries.
In case of stri_extract_*_words,
Just like in stri_count_words,
ICU's word BreakIterator iterator is used
to locate word boundaries, and all non-word characters
(UBRK_WORD_NONE rule status) are ignored.
For stri_extract_all_*,
if simplify=FALSE (the default), then a
list of character vectors is returned. Each string consists of
a separate word. In case of omit_no_match=FALSE and
if there are no words or if a string is missing,
a single NA is provided on output.
Otherwise, stri_list2matrix with byrow=TRUE argument
is called on the resulting object.
In such a case, a character matrix with length(str) rows
is returned. Note that stri_list2matrix's fill argument
is set to an empty string and NA,
for simplify equal to TRUE and NA, respectively.
For stri_extract_first_* and stri_extract_last_*,
a character vector is returned.
A NA element indicates no match.
Other search_extract: stri_extract_all,
stri_match_all,
stringi-search
Other locale_sensitive: %s<%,
stri_compare,
stri_count_boundaries,
stri_duplicated,
stri_enc_detect2,
stri_locate_all_boundaries,
stri_opts_collator,
stri_order,
stri_split_boundaries,
stri_trans_tolower,
stri_unique, stri_wrap,
stringi-locale,
stringi-search-boundaries,
stringi-search-coll
Other text_boundaries: stri_count_boundaries,
stri_locate_all_boundaries,
stri_opts_brkiter,
stri_split_boundaries,
stri_split_lines,
stri_trans_tolower,
stri_wrap,
stringi-search-boundaries,
stringi-search
stri_extract_all_words("stringi: THE string processing package 123.48...")