(a) The best value obtained for the k 1 parameter
| Combinations | Parameters | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| k 1 | b | k 3 | k 1 | b | k 3 | k 1 | b | k 3 | k 1 | b | k 3 | k 1 | b | k 3 | k 1 | b | k 3 | k 1 | b | k 3 | |
| 0 | 0.75 | 1.2 | 1 | 0.75 | 1.2 | 2 | 0.75 | 1.2 | 1.5 | 0.75 | 1.2 | 1.3 | 0.75 | 1.2 | 1.2 | 0.75 | 1.2 | 1.4 | 0.75 | 1.2 | |
| Porter stemmer-NLM stopwords |
0.1521 | 0.1803 | 0.1792 | 0.1792 | 0.1807 | 0.1798 | 0.1792 | ||||||||||||||
| Porter stemmer-SMART stopwords |
0.1531 | 0.1820 | 0.1783 | 0.1788 | 0.1813 | 0.1815 | 0.1807 | ||||||||||||||
| Krovetz stemmer-NLM stopwords |
0.1521 | 0.1797 | 0.1778 | 0.1802 | 0.1804 | 0.1806 | 0.1799 | ||||||||||||||
| Krovetz stemmer-SMART stopwords | 0.1557 | 0.1828 | 0.1793 | 0.1801 | 0.1824 | 0.1815 | 0.1819 | ||||||||||||||
The bold font refers to the best values for the parameters.