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Strictly Match a Value in a Character Vector

Source: R/utils.R
strict_match.Rd

Finds a unique match of a value in either the odd or even positions of a character vector. An error is raised if no match or more than one match is found in the selected positions.

Usage

strict_match(x, y, odd = TRUE)

Arguments

x

(character(1))
The value to match.

y

(character)
The character vector in which to search for x.

odd

(flag)
Whether to restrict the match to odd positions. Defaults to TRUE. If FALSE, only even positions are considered.

Value

An integer containing the unique position of x in y.

Author

WW

Examples

if (FALSE) { # \dontrun{
strict_match("A", c("A", "Placebo"))

strict_match("SEX", c("SomeVar", "SomeVal", "SEX", "Male"))

strict_match("ARM", c("SEX", "Male"))
strict_match("Male", c("SEX", "Male"))
strict_match("ARM", c("ARM", "Placebo", "ARM", "Active"))
} # }