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

["ASF subversion and git services (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-7524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15654145#comment-15654145 ] 

ASF subversion and git services commented on LUCENE-7524:
---------------------------------------------------------

Commit 6b9f11311a2481743d8b2b42a875a11162a5e215 in lucene-solr's branch refs/heads/master from [~jpountz]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=6b9f113 ]

LUCENE-7524: More detailed explanation of idf.


> 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
>         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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