R: Adding Items to Data

merge {arules} | R Documentation

## Adding Items to Data

### Description

Provides the generic function `merge` and the S4 methods for itemMatrix and transactions. The methods are used to add new items to existing data.

### Usage

    merge(x, y, ...)

### Arguments

`x` | an object of class `itemMatrix` or `transactions`.
`y` | an object of the same class as x (or something which can be coerced to that class).
`...` | further arguments; unused.

### Value

Returns a new object of the same class as x with the items in y added.

### Author(s)

Michael Hahsler

### See Also

`transactions-class`, `itemMatrix-class`, `addComplement`

### Examples

    data("Groceries")

    ## create a random item as a matrix
    randomItem <- sample(c(TRUE, FALSE), size=length(Groceries),replace=TRUE)
    randomItem <- as.matrix(randomItem)
    colnames(randomItem) <- "random item"
    head(randomItem, 3)

    ## add the random item to Groceries
    g2 <- merge(Groceries, randomItem)
    nitems(Groceries)
    nitems(g2)
    inspect(head(g2,3))

[Package arules version 1.6-7 Index]