Identifying Potential Clinical Syndromes of Hepatocellular Carcinoma Using PSO-Based Hierarchical Feature Selection Algorithm

Figure 6

Three inferred Bayesian networks based on symptom features. (a) The casual relationships among three clinical symptoms of “emotion” group. “Depression” might cause “sigh,” while “irritability” is an isolated node. (b) The casual relationships among four clinical symptoms of “cardiothoracic condition” group. (c) The casual relationships among seven clinical symptoms of “diet.”