Comments (2)
Generally, we have to calculate the Levenshtein distance ONLY for candidates that were found when deleting chars both on the input term, AND the dictionary term (deleting on both sides is required for replaces [kar->car] and adjacent transposes [acr->car] only).
Additionally, we can discard a candidate WITHOUT calculating the Levenshtein distance, if the delete positions in input term and dictionary term were on different sides of the resulting delete stem, and the number of deleted chars on both sides > maximum edit distance. But this requires that we store the delete positions together with the deletes.
Example:
[a]re
re[do]
The sum of deleted chars is 3, the maximum edit distance is 2, the delete positions are on different sides of the stem, so we can discard the suggestion without calculating the Levenshtein distance.
SymSpell contains additional optimizations (discard candidates without Levenshtein calculation) for the case when we don't need all suggestions below a maximum edit distance (Verbosity.All), but only those candidates with the lowest edit distance (Verbosity.Top Verbosity.Closest).
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That makes sense. Thanks for the clear answer.. now I can proceed with confidence. Best Regards
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Related Issues (20)
- Remove an entry? HOT 1
- Common contractions are missing from frequency_dictionary_en_82_765.txt HOT 6
- Use bigram for spell checking HOT 12
- nuspec needs to change .net472 to .net47 HOT 4
- Create native binary packages for distros
- CreateDictionaryEntry behavior when `word` is empty string HOT 2
- Predicts garbage for Bengali input HOT 2
- WordSegmentation throws exception on any version greater than 6.5.* for some terms HOT 3
- is there any flutter / dart port? HOT 2
- Speeling mistake in demo HOT 1
- Incorrect dictionary entry? (contraction "you'v")
- terms like "Category 1a" not suggested on LookupCompound
- Alternate string metrics
- how you can start the spelling
- Quality related question
- support for trigram dictionaries HOT 1
- OCR spelling mistakes HOT 2
- do you know somebody else repo in python pls HOT 2
- NullReferenceException in CommitStaged HOT 1
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