arules (version 1.7-9)

merge: Adding Items to Data

Description

Provides the generic function merge() and the methods for itemMatrix and transactions to add new items to existing data.

Usage

merge(x, y, ...)
# S4 method for itemMatrix
merge(x, y, ...)
# S4 method for transactions
merge(x, y, ...)

Value

Returns a new object of the same class as x with the items in y

added.

Arguments

x

an object of class itemMatrix or transactions.

y

an object of the same class as x (or something which can be coerced to that class).

...

further arguments; unused.

Author

Michael Hahsler

See Also

Other preprocessing: discretize(), hierarchy, itemCoding, sample()

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

Examples

data("Groceries")

## create a random item as a matrix
randomItem <- sample(c(TRUE, FALSE), size = length(Groceries), replace = TRUE)
randomItem <- as.matrix(randomItem)
colnames(randomItem) <- "random item"
head(randomItem, 3)

## add the random item to Groceries
g2 <- merge(Groceries, randomItem)
nitems(Groceries)
nitems(g2)
inspect(head(g2, 3))