fuzzyMatches {HELP} | R Documentation |
Match and reinterpret a vector in terms of a second vector, essentially using the second vector as a key to interpret the first.
fuzzyMatches(x, y, ...)
x |
vector, the values to be matched. |
y |
vector, the values to be matched against. |
... |
Arguments to be passed to methods (see getSamples-methods ):
strict x can reference values in y . If TRUE (default), only exact matches of values in x and y will be used. keep x (when strict = FALSE ). If TRUE (default), all values in x will be returned with those that match values in y replaced by the corresponding values in y . If FALSE, non-matching values will be removed. alias nomatch for non-matching values in x . match.all y (default is "*"). Any occurence of match.all in x will be replaced by all values in y . nomatch strict = FALSE , keep = TRUE , and alias = FALSE .na.rm x will cause an error and missing values in code{y} may cause unexpected behavior. ... |
This function employs multiple stages of matching between two vectors. First, the values in x
are matched against y
to find any exact matches. Next, numerical values in x
are used to retrieve the corresponding positions in y
. All unmatched values may be retained or dropped (depending on the value of keep
), and a list of unique values is returned. Note that a value of match.all
in x
will be interpreted as a match for ALL values in y
, and therefore replaced with the contents of y
.
Returns a vector of unique values in x
, that match values in y
according to the parameters described above.
Reid F. Thompson (rthompso@aecom.yu.edu)
a <- c(1, "four", "missing") b <- c("one", "two", "three", "four") fuzzyMatches(a, b) fuzzyMatches(a, b, strict=FALSE) fuzzyMatches(a, b, strict=FALSE, alias=FALSE) fuzzyMatches(a, b, strict=FALSE, keep=FALSE)