stri_count {stringi} | R Documentation |
These functions count the number of occurrences of a pattern in a string.
stri_count(str, ..., regex, fixed, coll, charclass) stri_count_charclass(str, pattern) stri_count_coll(str, pattern, ..., opts_collator = NULL) stri_count_fixed(str, pattern, ..., opts_fixed = NULL) stri_count_regex(str, pattern, ..., opts_regex = NULL)
str |
character vector with strings to search in |
... |
supplementary arguments passed to the underlying functions,
including additional settings for |
pattern, regex, fixed, coll, charclass |
character vector defining search patterns; for more details refer to stringi-search |
opts_collator, opts_fixed, opts_regex |
a named list used to tune up
a search engine's settings; see
|
Vectorized over str
and pattern
.
If pattern
is empty, then the result is NA
and a warning is generated.
stri_count
is a convenience function.
It calls either stri_count_regex
,
stri_count_fixed
, stri_count_coll
,
or stri_count_charclass
, depending on the argument used; relying
on one of those underlying functions will be faster.
All the functions return an integer vector.
Other search_count: stri_count_boundaries
,
stringi-search
s <- "Lorem ipsum dolor sit amet, consectetur adipisicing elit." stri_count(s, fixed="dolor") stri_count(s, regex="\\p{L}+") stri_count_fixed(s, " ") stri_count_fixed(s, "o") stri_count_fixed(s, "it") stri_count_fixed(s, letters) stri_count_fixed("babab", "b") stri_count_fixed(c("stringi", "123"), "string") stri_count_charclass(c("stRRRingi", "STrrrINGI", "123"), c("\\p{Ll}", "\\p{Lu}", "\\p{Zs}")) stri_count_charclass(" \t\n", "\\p{WHITE_SPACE}") # white space - binary property stri_count_charclass(" \t\n", "\\p{Z}") # whitespace - general category (note the difference) stri_count_regex(s, "(s|el)it") stri_count_regex(s, "i.i") stri_count_regex(s, ".it") stri_count_regex("bab baab baaab", c("b.*?b", "b.b")) stri_count_regex(c("stringi", "123"), "^(s|1)")