arules (version 0.6-1)

coverage: Calculate coverage for rules

Description

Provides the generic function and the needed S4 method to calculate the coverage (support of the left-hand-side) of rules.

Usage

coverage(x)

Arguments

x

the set of rules.

Value

• A numeric vector of the same length as x containing the coverage values for the sets in x.

Details

Coverage is calculated from the rules quality measures (support and confidence) stored in the quality slot.

See Also

rules-class

Examples

data("Income")

## find and some rules (we only use 5 rules here) and calculate coverage
rules <- apriori(Income)[1:5]
quality(rules) <- cbind(quality(rules), coverage = coverage(rules))

inspect(rules)