stringi (version 1.0-1)

stri_split_boundaries: Split a String at Specific Text Boundaries

Description

This function locates specific text boundaries (like character, word, line, or sentence boundaries) and splits strings at the indicated positions.

Usage

stri_split_boundaries(str, n = -1L, tokens_only = FALSE, simplify = FALSE,
  ..., opts_brkiter = NULL)

Arguments

str

character vector or an object coercible to

n

integer vector, maximal number of strings to return

tokens_only

single logical value; may affect the result if n is positive, see Details

simplify

single logical value; if TRUE or NA, then a character matrix is returned; otherwise (the default), a list of character vectors is given, see Value

...

additional settings for opts_brkiter

opts_brkiter

a named list with ICU BreakIterator's settings as generated with stri_opts_brkiter; NULL for the default break iterator, i.e. line_break

Value

• If simplify=FALSE (the default), then the functions return a list of character vectors.

  Otherwise, stri_list2matrix with byrow=TRUE and n_min=n arguments 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.

Details

Vectorized over str and n.

If n is negative (default), then all pieces are extracted. Otherwise, if tokens_only is FALSE (this is the default, for compatibility with the stringr package), then n-1 tokes are extracted (if possible) and the n-th string gives the (non-split) remainder (see Examples). On the other hand, if tokens_only is TRUE, then only full tokens (up to n pieces) are extracted.

For more information on the text boundary analysis performed by ICU's BreakIterator, see stringi-search-boundaries.

See Also

Other locale_sensitive: %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_extract_all_boundaries, stri_extract_all_words, stri_extract_first_boundaries, stri_extract_first_words, stri_extract_last_boundaries, stri_extract_last_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_collator; stri_order, stri_sort; stri_trans_tolower, stri_trans_totitle, stri_trans_toupper; stri_unique; stri_wrap; stringi-locale; stringi-search-boundaries; stringi-search-coll

Other search_split: stri_split_lines, stri_split_lines1, stri_split_lines1; stri_split, stri_split_charclass, stri_split_coll, stri_split_fixed, stri_split_regex; stringi-search

Other text_boundaries: stri_count_boundaries, stri_count_words; stri_extract_all_boundaries, stri_extract_all_words, stri_extract_first_boundaries, stri_extract_first_words, stri_extract_last_boundaries, stri_extract_last_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_lines, stri_split_lines1, stri_split_lines1; stri_trans_tolower, stri_trans_totitle, stri_trans_toupper; stri_wrap; stringi-search-boundaries; stringi-search

Examples

test <- "The\u00a0above-mentioned    features are very useful. " %s+%
   "Warm thanks to their developers. 123 456 789"
stri_split_boundaries(test, type="line")
stri_split_boundaries(test, type="word")
stri_split_boundaries(test, type="word", skip_word_none=TRUE)
stri_split_boundaries(test, type="word", skip_word_none=TRUE, skip_word_letter=TRUE)
stri_split_boundaries(test, type="word", skip_word_none=TRUE, skip_word_number=TRUE)
stri_split_boundaries(test, type="sentence")
stri_split_boundaries(test, type="sentence", skip_sentence_sep=TRUE)
stri_split_boundaries(test, type="character")