addNode
addNode
Add one or more nodes to a graph.
 Keywords
 manip
Usage
addNode(node, object, edges)
Arguments
 node
 A character vector of node names.
 object
 A
graph
 edges
 A named list of edges.
Details
The supplied node
s are added to the set of nodes of the
object
.
If edges
are provided then their must be the
same number as there are node
s and the must be in the same
order. The elements of the edges
list are vectors. They can be
character vectors of node labels for nodes in object
and if so
then they are added with unit weights. If the vector is numeric then
it must be named (with labels corresponding to nodes in the
object
) and the values are taken to be the edge weights.
When the object
is a distGraph
then the edges
must
be supplied and they must contain appropriate distances for all nodes
both those in object
and those supplied.
Value

A new graph of the same class as
object
with the supplied node
added to the set of nodes.
See Also
Examples
V < LETTERS[1:4]
edL1 < vector("list", length=4)
names(edL1) < V
for(i in 1:4)
edL1[[i]] < list(edges=c(2,1,4,3)[i], weights=sqrt(i))
gR < graphNEL(nodes=V, edgeL=edL1)
gX < addNode("X", gR)
set.seed(123)
g1 < randomGraph(letters[1:10], 1:4, p=.3)
g2 < addNode("z", g1, edges=list(c("a", "h", "g")))
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