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)
TRUE
or NA
, then a character matrix is returned;
otherwise (the default), a list of character vectors is given, see ValueFALSE
,
then a missing value will indicate that there are no wordsopts_brkiter
stri_opts_brkiter
;
NULL
for default break iterator, i.e. line_break
NULL
or ""
for text boundary analysis following
the conventions of the default locale, or a single string with
locale identifier, see stringi-locale.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.
str
.For more information on the text boundary analysis
performed by BreakIterator
, see
stringi-search-boundaries.
In case of stri_extract_*_words
,
Just like in stri_count_words
,
BreakIterator
iterator is used
to locate word boundaries, and all non-word characters
(UBRK_WORD_NONE
rule status) are ignored.
%s!==%
,
%s!=%
, %s<=%< a="">=%<>
,
%s<%< a="">%<>
, %s===%
,
%s==%
, %s>=%
,
%s>%
, %stri!==%
,
%stri!=%
, %stri<=%< a="">=%<>
,
%stri<%< a="">%<>
, %stri===%
,
%stri==%
, %stri>=%
,
%stri>%
; stri_cmp
,
stri_cmp_eq
, stri_cmp_equiv
,
stri_cmp_ge
, stri_cmp_gt
,
stri_cmp_le
, stri_cmp_lt
,
stri_cmp_neq
,
stri_cmp_nequiv
,
stri_compare
;
stri_count_boundaries
,
stri_count_words
;
stri_duplicated
,
stri_duplicated_any
;
stri_enc_detect2
;
stri_locate_all_boundaries
,
stri_locate_all_words
,
stri_locate_first_boundaries
,
stri_locate_first_words
,
stri_locate_last_boundaries
,
stri_locate_last_words
;
stri_opts_collator
;
stri_order
, stri_sort
;
stri_split_boundaries
;
stri_trans_tolower
,
stri_trans_totitle
,
stri_trans_toupper
;
stri_unique
; stri_wrap
;
stringi-locale
;
stringi-search-boundaries
;
stringi-search-coll
Other search_extract: stri_extract
,
stri_extract_all
,
stri_extract_all_charclass
,
stri_extract_all_coll
,
stri_extract_all_fixed
,
stri_extract_all_regex
,
stri_extract_first
,
stri_extract_first_charclass
,
stri_extract_first_coll
,
stri_extract_first_fixed
,
stri_extract_first_regex
,
stri_extract_last
,
stri_extract_last_charclass
,
stri_extract_last_coll
,
stri_extract_last_fixed
,
stri_extract_last_regex
;
stri_match
, stri_match_all
,
stri_match_all_regex
,
stri_match_first
,
stri_match_first_regex
,
stri_match_last
,
stri_match_last_regex
;
stringi-search
Other text_boundaries: stri_count_boundaries
,
stri_count_words
;
stri_locate_all_boundaries
,
stri_locate_all_words
,
stri_locate_first_boundaries
,
stri_locate_first_words
,
stri_locate_last_boundaries
,
stri_locate_last_words
;
stri_opts_brkiter
;
stri_split_boundaries
;
stri_split_lines
,
stri_split_lines1
,
stri_split_lines1
;
stri_trans_tolower
,
stri_trans_totitle
,
stri_trans_toupper
;
stri_wrap
;
stringi-search-boundaries
;
stringi-search
stri_extract_all_words("stringi: THE string processing package 123.48...")
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