associations-class {arules} | R Documentation

## Class “associations” - A Set of Associations

### Description

The `associations` class is a virtual class which is extended to represent mining result (e.g., sets of itemsets or rules). The class provides accessors for the quality slot and a method for sorting the associations.

### Objects from the Class

A virtual class: No objects may be created from it.

### Slots

`quality`:
  a data.frame for quality measures (e.g., interest measures as support or confidence). Each quality measure is a named vector with the same length as the number of elements in the set of associations and each vector element belongs to the association with the same index.

### Methods

items
  `signature(x = "associations")`; dummy method. This method has to be implemented by all subclasses of `associations` and return the items which make up each association as an object of class `itemMatrix`.
labels
  `signature(object = "associations")`; dummy method. This method has to be implemented by all subclasses of `associations` and return a vector of `length(object)` of labels for the elements in the association.
length
  `signature(x = "associations")`; dummy method. This method has to be implemented by all subclasses of `associations` and return the number of elements in the association.
quality<-
  `signature(x = "associations")`; replaces the quality `data.frame`. The lengths of the vectors in the data.frame have to equal the number of associations in the set.
quality
  `signature(x = "associations")`; returns the quality data.frame.
show
  `signature(object = "associations")`

### Subclasses

`itemsets-class`, `rules-class`

### See Also

`SORT`, `WRITE`, `length`, `is.subset`, `is.superset`, `sets`, `unique`, `itemMatrix-class`

[Package arules version 0.6-3 Index]