LIST: List Representation for Objects Based on Class itemMatrix

In arules: Mining Association Rules and Frequent Itemsets

List Representation for Objects Based on Class itemMatrix

Description

Provides the generic function LIST() and the methods to create a list representation from objects of the classes itemMatrix, transactions, and tidLists.

Usage

LIST(from, ...)

## S4 method for signature 'itemMatrix'
LIST(from, decode = TRUE)

## S4 method for signature 'transactions'
LIST(from, decode = TRUE)

## S4 method for signature 'tidLists'
LIST(from, decode = TRUE)

Arguments

from	the object to be converted into a list.
...	further arguments.
decode	a logical controlling whether the items/transactions are decoded from the column numbers internally used by itemMatrix to the names stored in the object from. The default behavior is to decode.

Details

Using LIST() with decode = TRUE is equivalent to the standard coercion as(x, "list"). LIST returns the object from as a list of vectors. Each vector represents one row of the itemMatrix (e.g., items in a transaction).

Value

a list primitive.

Author(s)

Michael Hahsler

See Also

Other import/export: DATAFRAME(), pmml, read, write()

Examples

data(Adult)

### default coercion (same as as(Adult[1:5], "list"))
LIST(Adult[1:5])

### coercion without item decoding
LIST(Adult[1:5], decode = FALSE)

arules documentation built on Sept. 11, 2024, 8:15 p.m.