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https://issues.apache.org/jira/browse/LUCENE-7156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15219832#comment-15219832
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ASF subversion and git services commented on LUCENE-7156:
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Commit 2f9a966b709a1a658f88bc317fea3cf9a3955f31 in lucene-solr's branch
refs/heads/branch_6x from [~teofili]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=2f9a966 ]
LUCENE-7156 - fixed precision and accuracy calculations
(cherry picked from commit d08f327)
> Wrong accuracy and precision calculations in confusion matrix
> -------------------------------------------------------------
>
> Key: LUCENE-7156
> URL: https://issues.apache.org/jira/browse/LUCENE-7156
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/classification
> Affects Versions: 5.5, 6.0
> Reporter: Tommaso Teofili
> Assignee: Tommaso Teofili
> Fix For: 6.1
>
>
> {{ConfusionMatrix#getPrecision}} has false positives counter wrongly
> initialized to _- classes.size()_ and {{ConfusionMatrix#getAccuracy}} doesn't
> take into account false negatives and true negatives therefore resulting in
> returning recall.
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