match(x, target)
x
| the values to be matched. |
table
| the values to be matched against. |
pmatch seeks matches for the elements of its first argument
among those of its second. If there is a unique match then the index
of the matching value is returned; if multiple matches are found then
0 is returned and if no match is found then NA is
returned.
This function is based on Terry Therneau's charmatch S function.