R: Find Duplicated Elements

duplicated {arules} | R Documentation

## Find Duplicated Elements

### Description

Provides the generic function `duplicated` and the S4 methods for `itemMatrix` and associations. `duplicated` finds duplicated elements in an `itemMatrix`. It returns a logical vector indicating which elements are duplicates.

Note that `duplicated` can also be used to find transactions with identical items and identical rules and itemsets stored in `rules` and `itemsets`.

### Usage

    duplicated(x, incomparables = FALSE, ...)

### Arguments

`x` | an object of class `itemMatrix` or associations.
`...` | further arguments (currently unused).
`incomparables` | argument currently unused.

### Value

A logical vector indicating duplicated elements.

### Author(s)

Michael Hahsler

### See Also

`unique`, `rules-class`, `itemsets-class`, `itemMatrix-class`

### Examples

    data("Adult")

    r1 <- apriori(Adult[1:1000], parameter = list(support = 0.5))
    r2 <- apriori(Adult[1001:2000], parameter = list(support = 0.5))

    ## Note this creates a collection of rules from two sets of rules
    r_comb <- c(r1, r2)
    duplicated(r_comb)

[Package arules version 1.6-2 Index]