arulesSequences (version 0.2-1)

size-methods: Compute the Size of Sequences

Description

size computes the size of a sequence. This can be either the number of (distinct) itemsets (elements) or items occurring in a sequence.

ritems compute the minimum (maximum) number an item or itemset (element) is repeatedly occurring in a sequence.

Usage

## S3 method for class 'sequences':
size(x, type = c("size", "itemsets", "length", "items"))
## S3 method for class 'sequences':
ritems(x, type = c("min", "max"), itemsets = FALSE)

Arguments

x

an object.

type, itemsets

as string (logical) value specifying the type of count to be computed.

Value

• Returns a vector of counts corresponding with the elements of object x.

See Also

Class sequences, timedsequences.

Examples

## continue example
example(cspade)

## default size
size(s2)
size(s2, "itemsets")
size(s2, "length")
size(s2, "items")

## crosstab
table(length = size(s1, "length"),
      items  = size(s1, "items"))

## repetitions
ritems(s1)
ritems(s1, "max")
ritems(s1, "max", TRUE)