Class "pEdge": A class to represent an edge
This class is used to represent all necessary information to plot an edge in Graphviz
The attrs slot is a named list, where the names correspond to
attributes and the values in the list correspond to the value for that
element's attribute.
The subG slot describes which subgraph this edge is a part of.
A value of 0 implies that the edge is not a member of any subgraph.
Objects can be created by calls of the form new("pEdge", ...).
from:Object of class "character": The name of
the node on the tail of this edge.
to:Object of class "character": The name of
the node on the head of this edge.
attrs:Object of class "list": A list of
attributes specific to this edge.
subG:Object of class "integer": Which subgraph
this edge is a part of.
signature(object = "pEdge"): Retrieves the
from slot of this edge
signature(object = "pEdge"): Retrieves the
to slot of this edge
R. Gentleman and Jeff Gentry
set.seed(123) V <- letters[1:10] M <- 1:4 g1 <- randomGraph(V, M, .2) z <- buildEdgeList(g1) vv <- z[[1]] ## Object of type pEdge vv from(vv) to(vv)
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