supportingTransactions {arules}

Supporting Transactions

Description

Find for each itemset in an associations object which transactions support (i.e., contains all items in the itemset) it. The information is returned as a tidLists object.

Usage

supportingTransactions(x, transactions, ...)

## S4 method for signature 'associations'
supportingTransactions(x, transactions)

Arguments

x

a set of associations (itemsets, rules, etc.)

transactions

an object of class transactions used to mine the associations in x.

...

currently unused.

Value

An object of class tidLists containing one transaction ID list per association in x.

Author(s)

Michael Hahsler

See Also

Other itemMatrix and transactions functions: abbreviate(), crossTable(), c(), duplicated(), extract, hierarchy, image(), inspect(), is.superset(), itemFrequencyPlot(), itemFrequency(), itemMatrix-class, match(), merge(), random.transactions(), sample(), sets, size(), tidLists-class, transactions-class, unique()

Examples

data <- list(
	c("a","b","c"),
	c("a","b"),
	c("a","b","d"),
	c("b","e"),
	c("b","c","e"),
	c("a","d","e"),
	c("a","c"),
	c("a","b","d"),
	c("c","e"),
	c("a","b","d","e")
	)
data <- as(data, "transactions")

## mine itemsets
f <- eclat(data, parameter = list(support = .2, minlen = 3))
inspect(f)

## find supporting Transactions
st <- supportingTransactions(f, data)
st

as(st, "list")