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[SPARK-13993][PySpark] Add pyspark Rformula/RforumlaModel save/load #11807

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[SPARK-13993][PySpark] Add pyspark Rformula/RforumlaModel save/load #11807

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cf59634
add pyspark rformula save/load
yinxusen Mar 18, 2016
d31bb3f
fix nit
yinxusen Mar 19, 2016
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30 changes: 27 additions & 3 deletions python/pyspark/ml/feature.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2360,7 +2360,7 @@ def explainedVariance(self):


@inherit_doc
class RFormula(JavaEstimator, HasFeaturesCol, HasLabelCol):
class RFormula(JavaEstimator, HasFeaturesCol, HasLabelCol, MLReadable, MLWritable):
"""
.. note:: Experimental

Expand All @@ -2376,7 +2376,8 @@ class RFormula(JavaEstimator, HasFeaturesCol, HasLabelCol):
... (0.0, 0.0, "a")
... ], ["y", "x", "s"])
>>> rf = RFormula(formula="y ~ x + s")
>>> rf.fit(df).transform(df).show()
>>> model = rf.fit(df)
>>> model.transform(df).show()
+---+---+---+---------+-----+
| y| x| s| features|label|
+---+---+---+---------+-----+
Expand All @@ -2394,6 +2395,29 @@ class RFormula(JavaEstimator, HasFeaturesCol, HasLabelCol):
|0.0|0.0| a| [0.0]| 0.0|
+---+---+---+--------+-----+
...
>>> rFormulaPath = temp_path + "/rFormula"
>>> rf.save(rFormulaPath)
>>> loadedRF = RFormula.load(rFormulaPath)
>>> loadedRF.getFormula() == rf.getFormula()
True
>>> loadedRF.getFeaturesCol() == rf.getFeaturesCol()
True
>>> loadedRF.getLabelCol() == rf.getLabelCol()
True
>>> modelPath = temp_path + "/rFormulaModel"
>>> model.save(modelPath)
>>> loadedModel = RFormulaModel.load(modelPath)
>>> loadedModel.uid == model.uid
True
>>> loadedModel.transform(df).show()
+---+---+---+---------+-----+
| y| x| s| features|label|
+---+---+---+---------+-----+
|1.0|1.0| a|[1.0,1.0]| 1.0|
|0.0|2.0| b|[2.0,0.0]| 0.0|
|0.0|0.0| a|[0.0,1.0]| 0.0|
+---+---+---+---------+-----+
...

.. versionadded:: 1.5.0
"""
Expand Down Expand Up @@ -2439,7 +2463,7 @@ def _create_model(self, java_model):
return RFormulaModel(java_model)


class RFormulaModel(JavaModel):
class RFormulaModel(JavaModel, MLReadable, MLWritable):
"""
.. note:: Experimental

Expand Down