str_count
From stringr v1.4.0
by Hadley Wickham
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 wantcoll()which respects character matching rules for the specified locale.Match character, word, line and sentence boundaries with
boundary(). An empty pattern, "", is equivalent toboundary("character").
Value
An integer vector.
See Also
stringi::stri_count() which this function wraps.
str_locate()/str_locate_all() to locate position
of matches
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("."))
# }
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