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(a) The best value for the M parameter
| Combinations | Parameters | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M | K | α | M | K | α | M | K | α | M | K | α | Baseline | |
| 10 | 10 | 0.5 | 5 | 10 | 0.5 | 15 | 10 | 0.5 | 30 | 10 | 0.5 | ||
| Porter stemmer-NLM stopwords | 0.2079 | 0.1991 | 0.2070 | 0.2053 | 0.1868 | ||||||||
| Porter stemmer-SMART stopwords | 0.2075 | 0.2026 | 0.2053 | 0.2052 | 0.1898 | ||||||||
| Krovetz stemmer-NLM stopwords | 0.2094 | 0.1974 | 0.2007 | 0.2025 | 0.1843 | ||||||||
| Krovetz stemmer-SMART stopwords | 0.2074 | 0.1998 | 0.2022 | 0.2056 | 0.1866 | ||||||||
The bold font refers to the best values for the parameters.
