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From: meng@apache.org
To: commits@spark.apache.org
Message-Id: <56f1ef04d37e44bf8390dc7e66912011@git.apache.org>
Subject: spark git commit: [SPARK-4972][MLlib] Updated the scala doc for lasso
 and ridge regression for the change of LeastSquaresGradient
Date: Tue, 30 Dec 2014 01:17:21 +0000 (UTC)

Repository: spark
Updated Branches:
  refs/heads/master 343db392b -> 040d6f2d1


[SPARK-4972][MLlib] Updated the scala doc for lasso and ridge regression for the change of LeastSquaresGradient

In #SPARK-4907, we added factor of 2 into the LeastSquaresGradient. We updated the scala doc for lasso and ridge regression here.

Author: DB Tsai <dbtsai@alpinenow.com>

Closes #3808 from dbtsai/doc and squashes the following commits:

ec3c989 [DB Tsai] first commit


Project: http://git-wip-us.apache.org/repos/asf/spark/repo
Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/040d6f2d
Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/040d6f2d
Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/040d6f2d

Branch: refs/heads/master
Commit: 040d6f2d13b132b3ef2a1e4f12f9f0e781c5a0b8
Parents: 343db39
Author: DB Tsai <dbtsai@alpinenow.com>
Authored: Mon Dec 29 17:17:12 2014 -0800
Committer: Xiangrui Meng <meng@databricks.com>
Committed: Mon Dec 29 17:17:12 2014 -0800

----------------------------------------------------------------------
 mllib/src/main/scala/org/apache/spark/mllib/regression/Lasso.scala | 2 +-
 .../scala/org/apache/spark/mllib/regression/RidgeRegression.scala  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/spark/blob/040d6f2d/mllib/src/main/scala/org/apache/spark/mllib/regression/Lasso.scala
----------------------------------------------------------------------
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/regression/Lasso.scala b/mllib/src/main/scala/org/apache/spark/mllib/regression/Lasso.scala
index f9791c6..8ecd5c6 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/regression/Lasso.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/regression/Lasso.scala
@@ -45,7 +45,7 @@ class LassoModel (
 /**
  * Train a regression model with L1-regularization using Stochastic Gradient Descent.
  * This solves the l1-regularized least squares regression formulation
- *          f(weights) = 1/n ||A weights-y||^2  + regParam ||weights||_1
+ *          f(weights) = 1/2n ||A weights-y||^2  + regParam ||weights||_1
  * Here the data matrix has n rows, and the input RDD holds the set of rows of A, each with
  * its corresponding right hand side label y.
  * See also the documentation for the precise formulation.

http://git-wip-us.apache.org/repos/asf/spark/blob/040d6f2d/mllib/src/main/scala/org/apache/spark/mllib/regression/RidgeRegression.scala
----------------------------------------------------------------------
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/regression/RidgeRegression.scala b/mllib/src/main/scala/org/apache/spark/mllib/regression/RidgeRegression.scala
index c8cad77..076ba35 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/regression/RidgeRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/regression/RidgeRegression.scala
@@ -45,7 +45,7 @@ class RidgeRegressionModel (
 /**
  * Train a regression model with L2-regularization using Stochastic Gradient Descent.
  * This solves the l1-regularized least squares regression formulation
- *          f(weights) = 1/n ||A weights-y||^2  + regParam/2 ||weights||^2
+ *          f(weights) = 1/2n ||A weights-y||^2  + regParam/2 ||weights||^2
  * Here the data matrix has n rows, and the input RDD holds the set of rows of A, each with
  * its corresponding right hand side label y.
  * See also the documentation for the precise formulation.


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