domain {relations} | R Documentation |
Determine the domain, domain names, arity, or size of a relation or a relation ensemble.
relation_arity(x) relation_domain(x) relation_domain_names(x) relation_size(x)
x |
an R object inheriting from class |
For determining the domain, an object of class relation_domain
,
inheriting from tuple
.
tuple
;
relation
;
relation_domain<-
and
relation_domain_names<-
for modifying the domain and domain names of a relation, respectively.
## A simple relation: R <- as.relation(c(A = 1, B = 2, C = 3)) relation_incidence(R) relation_arity(R) relation_domain(R) relation_domain_names(R) relation_size(R)