AUTO: Score repeated bigrams correctly, fixes #1959 #1993
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The current Sorensen-Dice coefficient algorithm does not correctly score strings with repeating bigrams. The score can end up being greater than 1 (the max possible score). This is because the algorithm does not consume bigrams as it matches them. The match count ends up being a count of the cartesian join of the matching bigrams. The revised algorithm in this change will consume bigrams as they are matched, preventing the cartesian join situation and providing correct scores.
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Jun 28, 2021
…4j-contrib#1993) The current Sorensen-Dice coefficient algorithm does not correctly score strings with repeating bigrams. The score can end up being greater than 1 (the max possible score). This is because the algorithm does not consume bigrams as it matches them. The match count ends up being a count of the cartesian join of the matching bigrams. The revised algorithm in this change will consume bigrams as they are matched, preventing the cartesian join situation and providing correct scores. Co-authored-by: Tom Larsen <larsenthomasj@gmail.com>
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