[LUCENE-7156] Wrong accuracy and precision calculations in confusion matrix

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.5, 6.0
• Fix Version/s: 6.1
• Component/s: modules/classification
• Lucene Fields: New
• Assignee: Tommaso Teofili
• Reporter: Tommaso Teofili
• Created: 31/Mar/16 12:42
• Updated: 28/Aug/22 14:54
• Resolved: 31/Mar/16 12:54

Description

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.