[SPARK-10394] Make GBTParams use shared "stepSize"

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.5.0
• Fix Version/s: 1.6.0
• Component/s: ML
• Target Version/s: 1.6.0
• Assignee: Yanbo Liang
• Reporter: Yanbo Liang
• Shepherd: Joseph K. Bradley
• Created: 01/Sep/15 10:16
• Updated: 17/Sep/15 18:25
• Resolved: 17/Sep/15 18:25

Description

GBTParams has "stepSize" as learning rate currently.
ML has shared param class "HasStepSize", GBTParams can extend from it rather than duplicated implementation.

Issue Links

• links to: [Github] Pull Request #8552 (yanboliang)