An improved dimensionality reduction method for meta-transcriptome indexing based diseases classification

Table 2 Classification ability on pneumonia data in 2-class problem.

Method	Error rate		Dimension	Feature number	Note
	On training data	On test data
svm/FMS	0.0922	0.1279	42	123
svm/mRMR	0.1313	0.1977	36	36
svm/KruskalWallis	0.1081	0.1628	62	62
svm/InformationGain	0.1456	0.186	54	54
svm/χ2 statistic	0.1561	0.186	127	127
svm	0.1611	0.1977	137	137
kNN/FMS	0.1279	0.2393	20	130	k = 1
kNN/mRMR	0.2532	0.3372	54	54	k = 1
kNN/KruskalWallis	0.1861	0.3343	25	25	k = 4
kNN/InformationGain	0.2248	0.3256	107	107	k = 1
kNN/χ2 statistic	0.336	0.4535	107	107	k = 1
kNN	0.346	0.4419	137	137	k = 1