[SPARK-31283] Simplify ChiSq by adding a common method

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.0
• Fix Version/s: 3.1.0
• Component/s: ML
• Assignee: Ruifeng Zheng
• Reporter: Ruifeng Zheng
• Created: 27/Mar/20 07:10
• Updated: 30/Mar/20 05:40
• Resolved: 30/Mar/20 05:38

Description

The logic in 'chiSquaredDenseFeatures' and 'chiSquaredSparseFeatures' can be unified.

Issue Links

• links to: GitHub Pull Request #28045