Alessandro Benedetti created LUCENE-6654:
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Summary: KNearestNeighborClassifier not taking in consideration
Class ranking
Key: LUCENE-6654
URL: https://issues.apache.org/jira/browse/LUCENE-6654
Project: Lucene - Core
Issue Type: Improvement
Components: modules/classification
Affects Versions: 5.2.1
Reporter: Alessandro Benedetti
Priority: Minor
Currently the KNN Classifier assign the score for a ClassificationResult, based
only on the frequency of the class in the top K results.
This is conceptually a simplification.
Actually the ranking must take a part.
If not this can happen :
Top 4
1) Class1
2) Class1
3) Class2
4) Class2
As a result of this Top 4 , both the classes will have the same score.
But the expected result is that Class1 has a better score, as the MLT score the
documents accordingly.
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