undirectedEdge-class: Class "undirectedEdge"

Description

Class for undirected edges

Objects can be created by calls of the form new("undirectedEdge", ...) which admit short-hands of the form u(...).

.Data:: Object of class "vector" storing strictly positive numbers that refer to a given "vertexSet" object

Class "edge", directly. Class "integer", from data part. Class "vector", by class "integer". Class "numeric", by class "integer".

initialize: signature(.Object = "undirectedEdge"): constructs an undirected edge from a vector of strictly positive integers
show: signature(object = "undirectedEdge"): displays an undirected edge as numbers joined by lines
showRel: signature(object = "undirectedEdge",code="vertexSet"): displays an undirected edge as names joined by lines
areTheSame: signature(x = "undirectedEdge", y = "undirectedEdge"): x and y are the same undirected edge if they are the same set of numbers
[: signature(x = "undirectedEdge"): extracts an undirected edge
coerce: signature(from = "vector", to = "undirectedEdge"): constructs an undirected edge from vector input
coerce: signature(from = "directedEdge", to = "undirectedEdge"): makes a directed edge undirected
maxId: signature(x="undirectedEdge"): gets the maximum numeric identifier of an undirected edge
recode: signature(object = "undirectedEdge",src="vertexSet",dst="vertexSet"): recodes an undirected edge by making its numbers refer to another "vertexSet" object

The constructor will try to handle any vector input by silently transforming it into a list of strictly positive integers.