| pmatch {base} | R Documentation |
Partial String Matching
Description
pmatch seeks matches for the elements of its first argument
among those of its second.
If there is a no match, then the value of nomatch
is returned and if there is a unique match then the index
of the matching value is returned.
If there are multiple matches the result depends
on the value of duplicates.ok.
If duplicates.ok is false multiple matches will result
in the value of nomatch being returned, and if it
is true, the index of the first matching value will be returned.
Usage
pmatch(x, table, nomatch = NA, duplicates.ok = FALSE)
Arguments
x |
the values to be matched. |
table |
the values to be matched against. |
nomatch |
the value returned at non-matching positions. |
duplicates.ok |
should duplicate matches be allowed. |
See Also
match, charmatch and
match.arg, match.fun,
match.call, for function argument matching etc.
Examples
pmatch("", "") # returns NA
pmatch("m", c("mean", "median", "mode")) # returns NA
pmatch("med", c("mean", "median", "mode")) # returns 2