add.edges(graph, edges, ..., attr=list())
add.vertices(graph, nv, ..., attr=list())
delete.edges(graph, edges)
delete.vertices(graph, v)
add.edges
adds the specified edges to the graph. The ids of the
vertices are preserved. The additionally supplied named arguments will
be added as edge attributes for the new edges. If an attribute was not
present in the original graph, its value for the original edges will
be NA
. add.vertices
adds the specified number of isolate vertices to
the graph. The ids of the old vertices are preserved. The additionally
supplied named arguments will be added as vertex attributes for the
new vertices. If an attribute was not present in the original graph,
its value is set to NA
for the original vertices.
delete.edges
removes the specified edges from the graph. If a
specified edge is not present, the function gives an error message,
and the original graph remains unchanged.
The ids of the vertices are preserved.
delete.vertices
removes the specified vertices from the graph
together with their adjacent edges. The ids of the vertices are
not preserved.
g <- graph.ring(10)
add.edges(g, c(1,5,2,6) )
delete.edges(g, E(g, P=c(0,9, 1,2)) )
delete.vertices(g, c(1,6,7) )
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