Tommaso Teofili created LUCENE-7156:
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Summary: 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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