match {arules} | R Documentation |
Provides the generic function match
and the S4 methods for associations and transactions.
match
returns a vector of the positions of (first) matches of
its first argument in its second.
match(x, table, nomatch = NA, incomparables = FALSE)
x |
an object of class itemMatrix , transactions or associations . |
table |
a set of associations or transactions to be matched against. |
nomatch |
the value to be returned in the case when no match is found. |
incomparables |
not implemented. |
An integer vector of the same length as x
giving the position in
table
of the
first match if there is a match, otherwise nomatch
.
rules-class
,
itemsets-class
,
itemMatrix-class
data("Adult") ### get unique transactions vals <- unique(Adult) ### count frequency of unique transactions cnts <- tabulate(match(Adult, vals)) ### plot frequency of unique transactions plot(sort(cnts, decreasing=TRUE))