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Yanbo Liang 435337381f [SPARK-6256] [MLlib] MLlib Python API parity check for regression 
MLlib Python API parity check for Regression, major disparities need to be added for Python list following:
```scala
LinearRegressionWithSGD
    setValidateData
LassoWithSGD
    setIntercept
    setValidateData
RidgeRegressionWithSGD
    setIntercept
    setValidateData
```
setFeatureScaling is mllib private function which is not needed to expose in pyspark.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #4997 from yanboliang/spark-6256 and squashes the following commits:

102f498 [Yanbo Liang] fix intercept issue & add doc test
1fb7b4f [Yanbo Liang] change 'intercept' to 'addIntercept'
de5ecbc [Yanbo Liang] MLlib Python API parity check for regression
2015-03-25 13:38:33 -07:00
..
stat [SPARK-5867] [SPARK-5892] [doc] [ml] [mllib] Doc cleanups for 1.3 release 2015-02-20 02:31:32 -08:00
__init__.py [SPARK-5867] [SPARK-5892] [doc] [ml] [mllib] Doc cleanups for 1.3 release 2015-02-20 02:31:32 -08:00
classification.py [Spark 6096][MLlib] Add Naive Bayes load save methods in Python 2015-03-20 14:53:59 -04:00
clustering.py [SPARK-6226][MLLIB] add save/load in PySpark's KMeansModel 2015-03-17 12:14:40 -07:00
common.py [SPARK-6226][MLLIB] add save/load in PySpark's KMeansModel 2015-03-17 12:14:40 -07:00
evaluation.py [SPARK-6090][MLLIB] add a basic BinaryClassificationMetrics to PySpark/MLlib 2015-03-05 11:50:09 -08:00
feature.py [SPARK-5974] [SPARK-5980] [mllib] [python] [docs] Update ML guide with save/load, Python GBT 2015-02-25 16:13:17 -08:00
linalg.py [SPARK-6121][SQL][MLLIB] simpleString for UDT 2015-03-02 17:14:34 -08:00
rand.py [SPARK-4891][PySpark][MLlib] Add gamma/log normal/exp dist sampling to P... 2015-01-08 15:03:43 -08:00
recommendation.py [SPARK-6097][MLLIB] Support tree model save/load in PySpark/MLlib 2015-03-02 22:27:01 -08:00
regression.py [SPARK-6256] [MLlib] MLlib Python API parity check for regression 2015-03-25 13:38:33 -07:00
tests.py [SPARK-6421][MLLIB] _regression_train_wrapper does not test initialWeights correctly 2015-03-20 17:18:18 -04:00
tree.py [SPARK-6097][MLLIB] Support tree model save/load in PySpark/MLlib 2015-03-02 22:27:01 -08:00
util.py [SPARK-6095] [MLLIB] Support model save/load in Python's linear models 2015-03-20 14:44:21 -04:00