Table 1.

Misclassification results for two kinds of cross-validation (2:1 CV and LOOCV) in leukemia data

Type of classification	No. of selected genes	2:1 CV (24 samples)	LOOCV (72 samples)
Type A	50	1/24	1/72
	100	1/24	1/72
	200	3/24	2/72
Type B	50	1/24	1/72
	100	1/24	1/72
	200	1/24	1/72
Type C	50	3/24	1/72
	100	2/24	2/72
	200	2/24	1/72

For the type A using 50 selected genes, 2:1 CV (LOOCV) gives 1 (1) misclassified samples out of 24 (72) samples.