is.superset {arules} | R Documentation |
Provides the generic functions
and the S4 methods is.subset
and is.superset
for finding super or subsets in associations and itemMatrix objects.
is.subset(x, y = NULL, proper = FALSE) is.superset(x, y = NULL, proper = FALSE)
x, y |
associations or itemMatrix objects. If y = NULL ,
the super or subset structure within set x is calculated. |
proper |
"logical" ; all or just proper super or subsets. |
looks for each element in x
which
elements in y
are supersets or subsets. Note that the method
can be very slow and memory intensive
if x
and/or y
contain many elements.
returns a
logical matrix with length(x)
rows
and length(y)
columns.
Each logical row vector represents which elements in y
are supersets (subsets) of the corresponding element in x
.
If either x
or y
have lenght zero, NULL
is returned
instead of a matrix.
associations-class
,
itemMatrix-class
data("Adult") set <- eclat(Adult, parameter = list(supp = 0.8)) ### find the supersets of each itemset in set is.superset(set, set)