An unconnected node, also called an isolated node, has no incoming or outgoing relationships. In graph analysis, it may indicate missing relationship data or represent a meaningful absence of network influence. section 9.2.2
Check isolated nodes before using graph features:
- Exclude them from training and test datasets when missing relationships may appear later; most node embedding models encode them identically, adding noise to classification. section 9.2.2 section 9.5
- Include them when the absence of relationships is genuine and itself carries predictive meaning, such as a person with no network influence. section 9.2.2
Twitch stream inspection
After importing Stream nodes and shared-audience relationships, inspect whether any Stream node lacks both incoming and outgoing relationships. The dataset contains no isolated nodes, but the check protects later embedding and classification steps. section 9.2.2
