Extract the result of a positional split string — str_split

Split up a string into pieces and extract the results using a specific index position. Mathematically, you can interpret it as follows:

Given a character string, S, extract the element at a given position, k, from the result of splitting S by a given pattern, m.

Usage

str_split_extract(string, pattern, position)

Arguments

string: Input vector. Either a character vector, or something coercible to one.
pattern: Pattern to look for. This may also contain regular expression.
position: Index position to return from the character vector.

Value

A character vector.

Examples

code <- c("HS-IB-EDE", "OG-OYO-CAS-0121", "NY-ILR-NIG-036")

str_split_extract(code, "-", 1)
#> [1] "HS" "OG" "NY"

str_split_extract(code, "-", 4)
#> [1] NA     "0121" "036"