Table 5.

Influence of the reduced dimension k on gene retrieval of the Alzheimer's disease pathway. Recall, precision, and F-measure were computed when 10 genes were retrieved.

	k	Recall	Precision	F-measure
LSI/SVD	2	0.5455	0.6000	0.5714
	3*	0.9091	1.0000	0.9524
	4	0.9091	1.0000	0.9524
	5	0.8182	0.9000	0.8571
	6	0.8182	0.9000	0.8571
	10	0.7273	0.8000	0.7619
	20	0.8182	0.9000	0.8571
	30	0.8182	0.9000	0.8571
	40	0.8182	0.9000	0.8571
	50	0.8182	0.9000	0.8571
GR/NMF	2	0.4545	0.5000	0.4762
	3*	0.9091	1.0000	0.9524
	4	0.9091	1.0000	0.9524
	5	0.9091	1.0000	0.9524
	6	0.8182	0.9000	0.8571
	10	0.8182	0.9000	0.8571
	20	0.7273	0.8000	0.7619

*The reduced dimension k obtained from the k-selection scheme using only known genes associated with this pathway.