Extract Data Between Text Boundaries
These functions extract data between 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,
see |
locale |
|
Vectorized over str.
For more information on 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 the 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 TRUE and NA, respectively.
For stri_extract_first_* and stri_extract_last_*,
a character vector is returned.
A NA element indicates a no-match.
Other search_extract:
about_search,
stri_extract_all(),
stri_match_all()
Other locale_sensitive:
%s<%(),
about_locale,
about_search_boundaries,
about_search_coll,
stri_compare(),
stri_count_boundaries(),
stri_duplicated(),
stri_enc_detect2(),
stri_locate_all_boundaries(),
stri_opts_collator(),
stri_order(),
stri_rank(),
stri_sort_key(),
stri_sort(),
stri_split_boundaries(),
stri_trans_tolower(),
stri_unique(),
stri_wrap()
Other text_boundaries:
about_search_boundaries,
about_search,
stri_count_boundaries(),
stri_locate_all_boundaries(),
stri_opts_brkiter(),
stri_split_boundaries(),
stri_split_lines(),
stri_trans_tolower(),
stri_wrap()
stri_extract_all_words('stringi: THE string processing package 123.48...')Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.