Alternate Low-Rank Matrix Approximation in Latent Semantic Analysis

Table 4

The accuracy of the returned documents by the SVD and the TULVD for the MED collection.

k	SVD			TULVD
	Min Cosine Similarity	Precision (10%)	Precision (50%)	Min Cosine Similarity	Precision (10%)	Precision (50%)
5	0.618	22.2	12.6	0.786	29.8	11.7
10	0.289	34.2	15.2	0.547	53.0	17.2
20	0.069	73.1	19.3	0.148	66.5	18.8
50	0.035	77.9	19.4	0.091	77.5	24.2
100	0.025	85.2	34.4	0.035	83.2	45.6
150	0.022	83.3	27.1	0.021	85.8	46.0
300	0.015	66.4	18.1	0.01	77.2	38.3
600	0.007	56.2	16.5	0.006	52.0	16.0
900	0.005	51.6	15.3	0.003	47.7	15.1
1033	0.003	49.6	15.5	0.001	46.9	15.2