Table 5. Number of features before and after dimensionality reduction for different datasets.

Number of features	jaffe	warpPIE10P	COIL20	Isolet
Before	676	2420	1024	617
After	238	277	119	337
Number of features	lung	ORL	TOX_171	Prostate_GE
Before	3312	1024	5748	5966
After	3170	405	5635	4818