Provides the generic function and the method is.closed() for finding
closed itemsets.
Closed itemsets are used as a concise representation of
frequent itemsets. The closure of an itemset is its largest proper superset
which has the same support (is contained in exactly the same transactions).
An itemset is closed, if it is its own closure (Pasquier et al. 1999).
is.closed(x)# S4 method for itemsets
is.closed(x)
a logical vector with the same length as x indicating for
each element in x if it is a closed itemset.
a set of itemsets.
Michael Hahsler
Closed frequent itemsets can also be mined directly using
apriori() or eclat() with target "closed frequent itemsets".
Nicolas Pasquier, Yves Bastide, Rafik Taouil, and Lotfi Lakhal (1999). Discovering frequent closed itemsets for association rules. In Proceeding of the 7th International Conference on Database Theory, Lecture Notes In Computer Science (LNCS 1540), pages 398--416. Springer, 1999.
Other postprocessing:
is.generator(),
is.maximal(),
is.redundant(),
is.significant(),
is.superset()
Other associations functions:
abbreviate(),
associations-class,
c(),
duplicated(),
extract,
inspect(),
is.generator(),
is.maximal(),
is.redundant(),
is.significant(),
is.superset(),
itemsets-class,
match(),
rules-class,
sample(),
sets,
size(),
sort(),
unique()