Trevor Grant created MAHOUT-1935:
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Summary: Inefficient use of XtX calculation in Ordinary Least
Squares
Key: MAHOUT-1935
URL: https://issues.apache.org/jira/browse/MAHOUT-1935
Project: Mahout
Issue Type: Improvement
Affects Versions: 0.13.0
Reporter: Trevor Grant
Priority: Minor
Fix For: 0.13.0
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
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