[SPARK-22156] Word2Vec: incorrect learning rate update equation when numIterations > 1

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: 2.3.0
• Component/s: MLlib
• Flags: Patch
• Assignee: Kento Nozawa
• Reporter: Kento Nozawa
• Created: 28/Sep/17 10:37
• Updated: 09/Feb/18 00:09
• Resolved: 07/Oct/17 07:31

Description

Current equation of learning rate is incorrect when numIterations > 1.
Original code: https://github.com/tmikolov/word2vec/blob/master/word2vec.c#L393

Issue Links

• links to: [Github] Pull Request #19372 (nzw0301)