Research Article
Alternate Low-Rank Matrix Approximation in Latent Semantic Analysis
Table 6
Average precision, recall, and total number of documents returned for various relative cosine threshold values for the ADI collection.
| Cosine threshold | SVD | TULVD | Recall | Precision | Average number of documents returned | Recall | Precision | Number of documents returned |
| 0.1 | 82.1 | 11.4 | 34.4 | 76.7 | 18.1 | 35.3 | 0.2 | 71.2 | 17.2 | 19.7 | 62.2 | 23.4 | 21.3 | 0.3 | 60.5 | 24.7 | 11.5 | 49.8 | 35.7 | 11.3 | 0.4 | 46.7 | 33.9 | 6.3 | 44.9 | 51.9 | 6.5 | 0.5 | 36.3 | 47.4 | 3.6 | 31.1 | 60.5 | 3.7 | 0.6 | 32.8 | 59.6 | 2.3 | 18.6 | 58.7 | 2.1 | 0.7 | 25.8 | 71.0 | 2.0 | 13.0 | 72.2 | 1.5 | 0.8 | 15.2 | 73.5 | 1.3 | 0.0 | 0.0 | 0.0 | 0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
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