A Compressive Sensing Model for Speeding Up Text Classification

Table 6

Execution time (s) of different DR methods on binary and multiclass classification datasets when using different subrates.

DR method	Subrate R
	0.1	0.2	0.3	0.4	0.5	0.6
Binary classification
PCA	384.75	384.75	384.75	384.75	384.75	384.75
ICA	369.72	3094.00	17259.27	34511.16	35281.73	50355.25
NMF	187.33	456.67	1169.65	1873.32	2481.44	2201.12
CS	3.32	3.64	3.92	4.19	4.58	4.63
Multiclass classification
PCA	275.49	275.49	275.49	275.49	275.49	275.49
ICA	188.77	382.82	990.19	6592.11	10829.64	20559.64
NMF	159.21	327.14	652.83	1239.35	1529.07	2358.88
CS	3.10	3.77	3.94	4.03	4.25	4.41

Note that SRM in CS is Block DCT.