charmatch seeks matches for the elements of its first argument
among those of its second.
Usage
charmatch(x, table, nomatch = NA_integer_)
Arguments
x
the values to be matched: converted to a character vector by
as.character. Long vectors are supported.
table
the values to be matched against: converted to a character
vector. Long vectors are not supported.
nomatch
the (integer) value to be returned at non-matching
positions.
Value
An integer vector of the same length as x, giving the
indices of the elements in table which matched, or nomatch.
Details
Exact matches are preferred to partial matches (those where the value
to be matched has an exact match to the initial part of the target,
but the target is longer).
If there is a single exact match or no exact match and a unique
partial match then the index of the matching value is returned; if
multiple exact or multiple partial matches are found then 0 is
returned and if no match is found then nomatch is returned.
NA values are treated as the string constant "NA".