stringr (version 0.5)

str_locate_all: Locate the position of all occurences of a pattern in a string.

Description

Locate the position of all occurences of a pattern in a string.

Usage

str_locate_all(string, pattern)

Arguments

string

input character vector

pattern

pattern to look for, as defined by a POSIX regular expression. See the ``Extended Regular Expressions'' section of regex for details.

Value

• list of integer matrices. First column gives start postion of match, and second column gives end position.

Details

Vectorised over string and pattern, shorter is recycled to same length as longest.

If the match is of length 0, (e.g. from a special match like $) end will be one character less than start.

See Also

regexpr which this function wraps

str_extract for a convenient way of extracting matches

str_locate to locate position of first match

Examples

fruit <- c("apple", "banana", "pear", "pineapple")
str_locate_all(fruit, "a")
str_locate_all(fruit, "e")
str_locate_all(fruit, c("a", "b", "p", "p"))