| size {arules} | R Documentation |
Number of Items in Sets
Description
Provides the generic function size() and methods to get the size of
each itemset in an itemMatrix or associations. For
example, size() can be used to get a vector with the number of items in each
transaction.
Usage
size(x, ...)
## S4 method for signature 'itemMatrix'
size(x)
## S4 method for signature 'tidLists'
size(x)
## S4 method for signature 'itemsets'
size(x)
## S4 method for signature 'rules'
size(x)
Arguments
x |
an object. |
... |
further (unused) arguments. |
Value
returns a numeric vector of length length(x).
Each element is the size of the corresponding element (row in the itemMatrix) in
object x. For rules, size() returns the sum of the number of
items in the LHS and the RHS.
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,
supportingTransactions(),
tidLists-class,
transactions-class,
unique()
Other associations functions:
abbreviate(),
associations-class,
c(),
duplicated(),
extract,
inspect(),
is.closed(),
is.generator(),
is.maximal(),
is.redundant(),
is.significant(),
is.superset(),
itemsets-class,
match(),
rules-class,
sample(),
sets,
sort(),
unique()
Examples
data("Adult")
summary(size(Adult))