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Commit bc04fa2e authored by Xiangrui Meng's avatar Xiangrui Meng
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[SPARK-6642][MLLIB] use 1.2 lambda scaling and remove addImplicit from NormalEquation


This PR changes lambda scaling from number of users/items to number of explicit ratings. The latter is the behavior in 1.2. Slight refactor of NormalEquation to make it independent of ALS models. srowen codexiang

Author: Xiangrui Meng <meng@databricks.com>

Closes #5314 from mengxr/SPARK-6642 and squashes the following commits:

dc655a1 [Xiangrui Meng] relax python tests
f410df2 [Xiangrui Meng] use 1.2 scaling and remove addImplicit from NormalEquation

(cherry picked from commit ccafd757)
Signed-off-by: default avatarXiangrui Meng <meng@databricks.com>

Conflicts:
	mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
parent 1c31ebd1
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