R: Data.frame Representation for arules Objects

DATAFRAME {arules} | R Documentation

## Data.frame Representation for arules Objects

### Description

Provides the generic function `DATAFRAME` and the S4 methods to create a data.frame representation from some arules objects. based on `rules`. These methods are used for the coercion to a data.frame, but offers more control over the coercion process (item separators, etc.).

### Usage

    DATAFRAME(from, ...)

### Arguments

`from` | the object to be converted into a data.frame (`rules`, `itemsets`, `transactions`).
`...` | further arguments.

### Details

Using `DATAFRAME` is equivalent to the standard coercion `as(x, "data.frame")`. However, for rules, the argument `separate = TRUE` will produce separate columns for the LHS and the RHS of the rule. Furthermore, the arguments `itemSep`, `setStart`, `setEnd` (and `ruleSep` for `separate = FALSE`) will be passed on to the `label` method.

### Value

a data.frame.

### Author(s)

Michael Hahsler

### See Also

`coerce,rules,data.frame-method`, `coerce,itemsets,data.frame-method`, `coerce,transactions,data.frame-method`, `labels,itemMatrix-method`, `LIST`

### Examples

    data(Adult)

    DATAFRAME(head(Adult))
    DATAFRAME(head(Adult), setStart = '', itemSep = ' + ', setEnd = '')

    rules <- apriori(Adult,
      parameter = list(supp = 0.5, conf = 0.9, target = "rules"))
    rules <- head(rules, by = "conf")

    ### default coercions (same as as(rules, "data.frame"))
    DATAFRAME(rules)

    DATAFRAME(rules, separate = TRUE)
    DATAFRAME(rules, separate = TRUE, setStart = '', itemSep = ' + ', setEnd = '')

[Package arules version 1.6-2 Index]