Recursive Feature Selection with Significant Variables of Support Vectors

Table 1

Comparison of selection methods on simulation data 1.

Num. of genes	RSVM			SVMRFE			SVM-𝑡
	Test (%)	Rec (%)	nSV	Test (%)	Rec (%)	nSV	Test (%)	Rec (%)	nSV
800	1.06±0.37	98.97±0.51	96.42±0.08	1.07±0.37	98.37±0.63	98.25±0.04	0.97±0.37	99.59±0.37	95.36±0.07
600	0.94±0.36	93.76±1.26	92.90±0.12	0.99±0.39	92.49±1.44	97.26±0.09	0.67±0.29	98.52±0.61	87.45±0.45
500	0.92±0.38	87.38±1.70	90.62±0.16	0.95±0.38	85.95±1.91	95.96±0.13	0.44±0.24	96.96±0.87	81.14±1.09
400	1.02±0.42	77.00±2.05	84.91±0.21	1.01±0.38	76.34±2.20	90.52±0.20	0.19±0.15	93.48±1.34	71.48±1.06
300	1.26±0.54	63.12±2.06	76.51±0.29	1.31±0.60	62.99±2.09	80.02±0.30	0.04±0.07	84.28±1.47	60.63±0.91
200	2.14±0.92	67.68±2.89	61.99±0.37	2.07±0.93	68.56±2.83	63.93±0.40	0.04±0.6	94.89±1.78	49.37±0.99
150	2.88±1.13	71.35±3.83	56.73±0.40	2.61±1.25	72.76±3.70	59.05±0.37	0.10±0.12	97.79±1.49	43.67±1.21
100	4.36±1.93	74.62±4.75	43.35±0.32	3.75±1.76	77.62±4.61	44.48±0.28	0.53±0.28	99.14±1.05	36.07±0.75
90	4.58±2.02	76.32±4.73	45.30±0.30	4.01±1.91	79.34±4.77	46.57±0.31	0.79±0.34	99.14±1.00	34.64±0.82
80	5.20±2.21	77.29±4.85	42.66±0.31	4.21±1.86	81.33±4.80	43.66±0.32	1.14±0.44	99.41±1.01	32.81±0.69
70	5.64±2.61	78.84±5.28	39.27±0.33	4.47±1.90	83.10±5.12	40.04±0.27	1.66±0.58	99.60±0.86	30.81±0.54
60	6.41±2.56	80.37±5.39	35.21±0.26	5.02±1.97	85.62±5.14	35.82±0.32	2.57±0.72	99.65±1.04	28.62±0.36
50	7.43±2.57	82.44±5.85	30.89±0.27	5.77±2.09	88.06±5.67	31.21±0.25	3.91±0.89	99.62±0.93	26.32±0.41

Num. of genes: number of selected features in each recursive step. Results of 1000 features are the same and we do not list them here.
Test: test error rate.
Rec: the percentage of recovery informative genes (among 300 informative genes).
nSV: the average number of support vectors selected in each recursive step.