[SPARK-39446] Add relevance score for nDCG evaluation in MLLIB

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.2.1
• Fix Version/s: 3.4.0
• Component/s: MLlib
• Assignee: Ryosuke Horiuchi
• Reporter: Ryosuke Horiuchi
• Created: 11/Jun/22 10:12
• Updated: 28/Jun/22 13:41
• Resolved: 16/Jun/22 13:25

Description

The current implementation of ndcgAt function treats relevance score as binary (as written Document).

However, it is better to extend this to accept a user-defined relevance score to calculate nDCG more flexibly. 

Issue Links

• links to: [Github] Pull Request #36843 (uchiiii)
• links to: [Github] Pull Request #36920 (uchiiii)
• links to: [Github] Pull Request #37019 (uchiiii)