length

0th

Percentile

Getting the Number of Elements

S4 methods for length which return the number of elements of objects defined in the package arules.

Keywords
attribute
Usage

# S4 method for rules length(x)

# S4 method for itemsets length(x)

# S4 method for tidLists length(x)

# S4 method for itemMatrix length(x)

Arguments
x

an object of class '>transactions, '>rules, '>itemsets, '>tidLists, or '>itemMatrix.

Details

For '>itemMatrix and '>transactions the length is defined as the number of rows (transactions) in the binary incidence matrix.

For sets of associations ('>rules, '>itemsets and '>associations in general) the length is defined as the number of elements in the set (i.e., the number of rules or itemsets).

For '>tidLists the length is the number of lists (one per item or itemset) in the object.

Value

An integer scalar giving the “length” of x.

Aliases
  • length
  • length,itemMatrix-method
  • length,rules-method
  • length,itemsets-method
  • length,tidLists-method
Documentation reproduced from package arules, version 1.5-4, License: GPL-3

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