MixedGraphQ

MixedGraphQ[g] yields True if the graph g is a mixed graph and False otherwise.

Examples

Test a mixed graph with both directed and undirected edges:

g = Graph[{1 <-> 2, 2 -> 3}];
MixedGraphQ[g]
(* True *)

Test a purely undirected graph:

MixedGraphQ[CompleteGraph[4]]
(* False *)

Please visit the official Wolfram Language Reference for more details.