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  1. Lucene - Core
  2. LUCENE-6654

KNearestNeighborClassifier not taking in consideration Class ranking

    Details

    • Lucene Fields:
      Patch Available

      Description

      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.

        Attachments

        1. LUCENE-6654.patch
          12 kB
          Alessandro Benedetti

          Activity

            People

            • Assignee:
              teofili Tommaso Teofili
              Reporter:
              alessandro.benedetti Alessandro Benedetti
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              Dates

              • Created:
                Updated:
                Resolved: