TABLE 5.

Confusion matrix using 8,000 training data points.

(a) Semi-supervised learning
		Predicted labels
		Low-level signal	Single fetal heartbeat	Multiple heartbeats	Artifact
True Labels	Low-level signal	2,328	3	29	40
	Single fetal heartbeat	5	1,630	34	731
	Multiple heartbeats	31	26	2,232	111
	Artifact	37	670	121	1,572

(b) Supervised learning
		Predicted labels
		Low-level signal	Single fetal heartbeat	Multiple heartbeats	Artifact
True Labels	Low-level signal	2,328	0	26	46
	Single fetal heartbeat	2	1,579	28	791
	Multiple heartbeats	20	28	2,226	126
	Artifact	28	717	144	1,511