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https://issues.apache.org/jira/browse/LUCENE-6654?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tommaso Teofili reassigned LUCENE-6654:
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Assignee: Tommaso Teofili
> 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
> Assignee: Tommaso Teofili
> Priority: Minor
> Labels: classification, knn
> Attachments: LUCENE-6654.patch
>
>
> 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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