Locate the position of patterns in a string.
Vectorised over string and pattern. If the match is of length
0, (e.g. from a special match like $) end will be one character less
than start.
str_locate(string, pattern) str_locate_all(string, pattern)
string |
Input vector. Either a character vector, or something coercible to one. |
pattern |
Pattern to look for. The default interpretation is a regular expression, as described
in stringi::stringi-search-regex. Control options with
Match a fixed string (i.e. by comparing only bytes), using
Match character, word, line and sentence boundaries with
|
For str_locate, an integer matrix. First column gives start
postion of match, and second column gives end position. For
str_locate_all a list of integer matrices.
str_extract() for a convenient way of extracting matches,
stringi::stri_locate() for the underlying implementation.
fruit <- c("apple", "banana", "pear", "pineapple")
str_locate(fruit, "$")
str_locate(fruit, "a")
str_locate(fruit, "e")
str_locate(fruit, c("a", "b", "p", "p"))
str_locate_all(fruit, "a")
str_locate_all(fruit, "e")
str_locate_all(fruit, c("a", "b", "p", "p"))
# Find location of every character
str_locate_all(fruit, "")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.