Table 1.

Overview of the six public gene expression datasets.

Datasets	Genes	Samples (category)	Classes	Author
Colon cancer	2000	62(Tumor(40), Normal(22))	2	Sun et al.3
Leukemia	7129	72(ALL(47), AML(25))	2	Chen et al.37
Prostate	12600	136(Tumour (77), Normal (59))	2	Sun et al.14
Lung	12600	203(Adeno(139), NORM(17), Squamous(21), COID(20), SMCL(6))	5	Liu et al.6
Brain	12000	50(Tumour (20), Normal (30))	2	Li et al.40
SRBCT	2308	83(EWS(29), BL(11), NB(18), RMS(25))	4	Lu et al.32