Research Article
Negative and Positive Association Rules Mining from Text Using Frequent and Infrequent Itemsets
Table 1
IDF scores of sample keywords of the corpus.
| Selected keywords | IDF | Discarded keywords | IDF |
| Chemo | 2.2693 | Threat | 0.0158 | Radiation | 2.2535 | Disease | 0.0157 | Tumor | 2.2316 | Severe | 0.01426 | Surgery | 2.2135 | Produce | 0.01392 | Cancer | 2.2013 | Result | 0.01194 | Temodar | 1.9830 | Need | 0.00639 | CT scan | 1.9812 | Analysis | 0.00136 | Glioblastoma | 1.9609 | Type | 0.00940 | Skull | 1.8906 | New | 0.00843 | Cause | 1.8902 | Level | 0.00694 | ⋯ | ⋯ | ⋯ | ⋯ |
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