whichAeqB: Index of a single match

In Ecfun: Functions for 'Ecdat'

Index of a single match

Description

Return which(A %in% B) if it has length 1; give an error message otherwise.

Usage

whichAeqB(A, B, errNoMatch='no match',
                      err2Match='more than one match')

Arguments

A	A vector which may have a single match in B.
B	A vector of possible matches for A.
errNoMatch	a character string: error message if no match found.
err2Match	a character string: error message if multiple matches found.

Value

a single integer giving the index of the match in A.

Author(s)

Spencer Graves

See Also

interpPairs

Examples

a2b <- whichAeqB(letters, 'b')


all.equal(a2b, 2)

Ecfun documentation built on April 12, 2025, 2:27 a.m.