Table 4. Classification performance on feature ranking metrics with varying number of terms on BET dataset.

	Feature selection measures
No. of terms	NDM	BNS	OR	Gini	DFS	IG	CS	NES
100	0.69	0.85	0.74	0.51	0.88	0.88	0.88	0.87
200	0.81	0.78	0.8	0.8	0.86	0.84	0.85	0.88
300	0.82	0.76	0.76	0.81	0.85	0.85	0.85	0.86
400	0.83	0.73	0.78	0.84	0.87	0.83	0.86	0.86
500	0.85	0.77	0.79	0.86	0.87	0.87	0.87	0.87
1,000	0.84	0.85	0.82	0.86	0.87	0.87	0.87	0.85
1,500	0.85	0.85	0.83	0.87	0.85	0.87	0.86	0.85
2,000	0.84	0.84	0.84	0.85	0.85	0.87	0.87	0.85