[jira] [Resolved] (LUCENE-7524) More detailed explanation of idf

["Adrien Grand (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-7524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adrien Grand resolved LUCENE-7524.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 6.4
                   master (7.0)

> More detailed explanation of idf
> --------------------------------
>
>                 Key: LUCENE-7524
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7524
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Priority: Minor
>             Fix For: master (7.0), 6.4
>
>         Attachments: LUCENE-7524.patch
>
>
> The explanations of idf give the docCount and docFreq, but they do not say how the idf is computed even though the formula is different eg. for ClassicSimilarity and BM25Similarity. Maybe it would help to put the formula in the explanations?



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