Table 1.

The mean and the Standard deviation of the 10-fold cross-validation error (in percentage) for the different approaches and the Affymetrix platform datasets employed in the study.

Method	CNS	Colon	Leukemia	Prostate
Gene selection	mean ± std	mean ± std	mean ± std	mean ± std
U, SNR, NMC	30.4 ± 6.5 *	12.9 ± 4.2 *	4.8 ± 2.7 *	9.7 ± 4.2 *
U, SNR, FLD	42.5 ± 7.3	19.2 ± 5.9	8.0 ± 3.2	10.0 ± 3.0 *
U, t-test, NMC	32.5 ± 4.9 *	12.5 ± 4.2 *	4.8 ± 2.7 *	10.8 ± 3.4
U, t-test, FLD	35.8 ± 6.5 *	11.7 ± 3.5 *	12.0 ± 4.2	8.0 ± 2.5 *
BP greedy, FLD	43.8 ± 6.2	12.9 ± 3.8 *	11.6 ± 3.6	9.8 ± 3.3 *
FS, FLD	47.9 ± 5.1	15.4 ± 4.1	10.2 ± 4.2	14.0 ± 3.4
RFE, FLD	34.2 ± 5.0 *	22.9 ± 4.4	3.5 ± 2.6 *	10.0 ± 2.6 *
RFE, SVM	35.4 ± 5.0 *	22.1 ± 3.5	4.5 ± 2.6 *	8.0 ± 2.9 *
Liknon	32.9 ± 6.1 *	13.3 ± 4.2 *	11.8 ± 4.0	10.8 ± 3.7
TSP	47.0 ± 5.6	5.4 ± 2.9 *	10.6 ± 3.8	7.0 ± 2.6 *
no gene selection	mean ± std	mean ± std	mean ± std	mean ± std
NMC	42.1 ± 5.5	17.9 ± 3.3	3.5 ± 2.6 *	33.7 ± 3.9
FLD	32.9 ± 6.3 *	21.7 ± 3.7	4.5 ± 2.6 *	8.0 ± 2.5 *
SVM	35.4 ± 7.0 *	22.1 ± 3.5	3.5 ± 2.6 *	8.0 ± 2.9 *