When importing data from the Import Spreasdsheet, edges that connect a node to itself can be imported as a directed edge. However, the degree metric for this node counts both the outbound edge and the inbound edge separately, resulting in a degree count of 2.
When importing data from text with a type field set to Undirected, edges that connect a node to itself are imported as type Directed (other edges are typed Undirected as expected). I am unable to change the type of an edge with the right-click Edit Edge function.
When I attempt to add an edge with the Add Edge function, the dialog arranges the node dropdowns so that the same node is never available for both source and target.
Fix add edge in data laboratory Issue #683