Nodes are the vertices in the graph that are shared by "arcs".
sc_node(x, ...)
# S3 method for class 'SC'
sc_node(x, ...)
# S3 method for class 'SC0'
sc_node(x, ...)
# Default S3 method
sc_node(x, ...)
# S3 method for class 'PATH'
sc_node(x, ...)
# S3 method for class 'ARC'
sc_node(x, ...)data frame of the nodes