str_count

0th

Percentile

Count the number of matches in a string.

Vectorised over string and pattern.

Usage
str_count(string, pattern = "")
Arguments
string

Input vector. Either a character vector, or something coercible to one.

pattern

Pattern to look for.

The default interpretation is a regular expression, as described in stringi::stringi-search-regex. Control options with regex().

Match a fixed string (i.e. by comparing only bytes), using fixed(). This is fast, but approximate. Generally, for matching human text, you'll want coll() which respects character matching rules for the specified locale.

Match character, word, line and sentence boundaries with boundary(). An empty pattern, "", is equivalent to boundary("character").

Value

An integer vector.

See Also

stringi::stri_count() which this function wraps.

str_locate()/str_locate_all() to locate position of matches

Aliases
  • str_count
Examples
# NOT RUN {
fruit <- c("apple", "banana", "pear", "pineapple")
str_count(fruit, "a")
str_count(fruit, "p")
str_count(fruit, "e")
str_count(fruit, c("a", "b", "p", "p"))

str_count(c("a.", "...", ".a.a"), ".")
str_count(c("a.", "...", ".a.a"), fixed("."))
# }
Documentation reproduced from package stringr, version 1.3.1, License: GPL-2 | file LICENSE

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