Show the list of edges (of the graph) of a pcAlgo object; this is intended to be an alternative if Rgraphviz does not work.
showEdgeList(object, labels = NULL)optional labels for nodes; by default, the labels from
the object are used.
none; the purpose is in (the side effect of) printing the edge list.
showAmat for the adjacency matrix of a '>pcAlgo object.
iplotPC for plotting a pcAlgo object using the package
igraph, also for an example of showEdgeList().