| classes {relations} | R Documentation |
Provide class ids or classes, respectively, for an equivalence relation or the indifference relation of a weak order.
relation_class_ids(x) relation_classes(x)
x |
an object inheriting from class |
For relation_class_ids, a numeric vector with class ids
corresponding to the classes of the equivalence relation, or the
indifference relation of the weak order with ids ordered according to
increasing preference.
For relation_classes, an object of class
relation_classes_of_objects, which is a list of sets giving the
elements in the corresponding classes, named by the class ids.
## Equivalence.
f <- factor(rep(c("Good", "Bad", "Ugly"), c(3, 2, 1)))
R <- as.relation(f)
relation_is_equivalence(R)
table(ids = relation_class_ids(R), orig = f)
relation_classes(R)
## Weak order ("weak preference").
f <- ordered(f, levels = c("Ugly", "Bad", "Good"))
R <- as.relation(f)
relation_is_weak_order(R)
table(ids = relation_class_ids(R), orig = f)
relation_classes(R)