Compute the Size of Sequences
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.
# S4 method for sequences size(x, type = c("size", "itemsets", "length", "items"))
# S4 method for sequences ritems(x, type = c("min", "max"), itemsets = FALSE)
- an object.
- type, itemsets
- as string (logical) value specifying the type of count to be computed.
Returns a vector of counts corresponding with the elements
The total number of items occurring in a sequence is often referred
to as the length of the sequence. Similarly, we refer to the
total number of itemsets as the
size of the sequence. Note
that we follow this terminology in the summary methods.
## 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)