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[SPARK-19852][PYSPARK][ML] Python StringIndexer supports 'keep' to handle invalid data #18453

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yanboliang wants to merge 7 commits into from
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[SPARK-19852][PYSPARK][ML] Python StringIndexer supports 'keep' to handle invalid data #18453

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576e530
[SPARK-19852][PYSPARK][ML] Update Python API for StringIndexer setHan…
Mar 10, 2017
8c04830
fix compilation issues
Mar 10, 2017
79dbf81
doctest
Mar 10, 2017
764e099
update doctest
Mar 10, 2017
9809be9
include changes made by SPARK-11569
Mar 17, 2017
6f3bea8
Move doc tests to tests.py.
yanboliang Jun 28, 2017
320fe08
To override param.
yanboliang Jul 1, 2017
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doctest 
Signed-off-by: VinceShieh <[email protected]>
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@yanboliang
VinceShieh authored and yanboliang committed Jul 1, 2017
commit 79dbf81fb26d4c1d85f68d0b9dec73b8810f5157
6 changes: 4 additions & 2 deletions python/pyspark/ml/feature.py
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Expand Up @@ -2100,8 +2100,10 @@ class StringIndexer(JavaEstimator, HasInputCol, HasOutputCol, JavaMLReadable, Ja
>>> testData2 = sc.parallelize([Row(id=0, label="a"), Row(id=1, label="d"),
... Row(id=2, label="e")], 2)
>>> dfKeep= spark.createDataFrame(testData2)
>>> tdK = stringIndexer.setHandleInvalid("keep").fit(stringIndDf).transform(dfKeep)
>>> itdK = inverter.transform(tdK)
>>> modelKeep = stringIndexer.setHandleInvalid("keep").fit(stringIndDf)
>>> tdK = modelKeep.transform(dfKeep)
>>> itdK = IndexToString(inputCol="indexed", outputCol="label2",
... labels=modelKeep.labels).transform(tdK)
>>> sorted(set([(i[0], str(i[1])) for i in itdK.select(itdK.id, itdK.label2).collect()]),
... key=lambda x: x[0])
[(0, 'a'), (6, 'd'), (6, 'e')]
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