| /* ----------------------------------------------------------------------- *//** |
| * |
| * @file assoc_rules.hpp |
| * |
| *//* ----------------------------------------------------------------------- */ |
| |
| /** |
| * @brief Given the text form of a closed frequent pattern (cfp), this function |
| * generates the association rules for that pattern. We use text format |
| * because text values are hash joinable. The output is a set of text |
| * array. For example, assuming the input pattern is '1,2,3'. |
| * The result rules: |
| * array['1', '2,3'] |
| * array['2', '1,3'] |
| * array['3', '1,2'] |
| * array['1,2', '3'] |
| * array['1,3', '2'] |
| * array['2,3', '1'] |
| * Note that two meaningless rules will be excluded: |
| * array['1,2,3', NULL] |
| * array[NULL, '1,2,3'] |
| * |
| * @param arg 1 The text form of a closed frequent pattern. |
| * @param arg 2 The number of items in the pattern. |
| * |
| * @return A set of text array. Each array has two elements, corresponding to |
| * the left and right parts of an association rule. |
| * |
| */ |
| DECLARE_SR_UDF(assoc_rules, gen_rules_from_cfp) |
| |
