addEdge
addEdge
A function to add an edge to a graph.
 Keywords
 manip
Usage
addEdge(from, to, graph, weights)
Arguments
 from
 The node the edge starts at
 to
 The node the edge goes to.
 graph
 The graph that the edge is being added to.
 weights
 A vector of weights, one for each edge.
Details
Both from
and to
can be vectors. They need not be the
same length (if not the standard rules for replicating the shorter one
are used). Edges are added to the graph between the supplied nodes.
The weights
are given for each edge.
The implementation is a bit too oriented towards the graphNEL
class and will likely change in the next release to accomodate more
general graph classes.
If the graph is undirected then the edge is bidirectional (and only needs to be added once). For directed graphs the edge is directional.
Value

A new instance of a graph object with the same class as
graph
but with the indicated edges added.
See Also
Examples
V < LETTERS[1:4]
edL2 < vector("list", length=4)
names(edL2) < V
for(i in 1:4)
edL2[[i]] < list(edges=c(2,1,2,1)[i], weights=sqrt(i))
gR2 < graphNEL(nodes=V, edgeL=edL2, edgemode="directed")
gX < addEdge("A", "C", gR2, 1)
gR3 < randomEGraph(letters[10:14], .4)
gY < addEdge("n", "l", gR3, 1)
Community examples
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