[MAHOUT-1935] Inefficient use of XtX calculation in Ordinary Least Squares

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.13.0
• Fix Version/s: 0.13.0
• Labels: beginner
• Epic Link: Algorithms
• Sprint: 0.14.0 Release
• Assignee: Trevor Grant
• Reporter: Trevor Grant
• Created: 03/Feb/17 16:40
• Updated: 07/Feb/17 04:32
• Resolved: 07/Feb/17 04:08

Description

In line 59 of OrdinaryLeastSquaresModel we calculate and collect XtX, but then don't bother to use it (so it is in essence calculated twice).

~https://github.com/apache/zeppelin/blob/master/spark/src/main/java/org/apache/zeppelin/spark/SparkInterpreter.java~

Not sure how that link got in there. It is unrelated.

Issue Links

• links to: GitHub Pull Request #277