Gets graph information
graph_info(edgelist, vertices, sorted = FALSE, decreasing = FALSE,
ordering = NULL, labels = NULL)basically a two-column matrix with edges
optional vector of vertex names corresponding with those in the edgelist
logical to indicate if nodes should be sorted
(default FALSE)
logical to indicate type of sorting
(used only when sorted=TRUE)
optional numeric or string vector providing the
ordering of nodes. When provided, this parameter overrides
sorted=TRUE). See the details section for more information.
optional string vector with labels for the nodes