stri_count
From stringi v1.0-1
by Marek Gagolewski
Count the Number of Pattern Matches
These functions count the number of occurrences of a pattern in a string.
Usage
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)
Arguments
- str
- character vector with strings to search in
- ...
- supplementary arguments passed to the underlying functions,
including additional settings for
opts_collator,opts_regex,opts_fixed, and so on - 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
stri_opts_collator,stri_opts_fixed, and
Details
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.
Value
- All the functions return an integer vector.
See Also
Other search_count: stri_count_boundaries,
stri_count_words;
stringi-search
Examples
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)")Community examples
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