Dig ancestors of an association rule

Searches for all association rules that are ancestors of the given association rule, i.e. all rules whose antecedent is a subset of the antecedent of the given rule and whose consequent is equal to the consequent of the given rule. The search is performed using the same disjoint, excluded, and t_norm parameters as the original search that produced the given rule.

Usage

# S3 method for class 'associations'
dig_ancestors(x, data, ...)

dig_ancestors(x, data, ...)

Arguments

x

A nugget of flavour associations containing a single association rule. (Typically created with dig_associations().)

data

a matrix or data frame with data to search in. The matrix must be numeric (double) or logical. If x is a data frame then each column must be either numeric (double) or logical.

...

further arguments (currently not used).

Value

A nugget of flavour associations containing all association rules that are ancestors of the given rule x.

See also

dig_associations()

Author

Michal Burda

Examples

d <- partition(mtcars, .breaks = 2)
rules <- dig_associations(d,
                          antecedent = !starts_with("mpg"),
                          consequent = starts_with("mpg"),
                          min_support = 0.3,
                          min_confidence = 0.8)
r <- rules[1, ]  # get first rule
anc <- dig_ancestors(r, d)