096cb127ac
Author: Holden Karau <holden@pigscanfly.ca>
Closes #6139 from holdenk/SPARK-7511-pyspark-ml-seed-param-should-be-random-by-default-or-42-is-quite-funny-but-not-very-random and squashes the following commits:
591f8e5 [Holden Karau] specify old seed for doc tests
2470004 [Holden Karau] Fix a bunch of seeds with default values to have None as the default which will then result in using the hash of the class name
cbad96d [Holden Karau] Add the setParams function that is used in the real code
423b8d7 [Holden Karau] Switch the test code to behave slightly more like production code. also don't check the param map value only check for key existence
140d25d [Holden Karau] remove extra space
926165a [Holden Karau] Add some missing newlines for pep8 style
8616751 [Holden Karau] merge in master
58532e6 [Holden Karau] its the __name__ method, also treat None values as not set
56ef24a [Holden Karau] fix test and regenerate base
afdaa5c [Holden Karau] make sure different classes have different results
68eb528 [Holden Karau] switch default seed to hash of type of self
89c4611 [Holden Karau] Merge branch 'master' into SPARK-7511-pyspark-ml-seed-param-should-be-random-by-default-or-42-is-quite-funny-but-not-very-random
31cd96f [Holden Karau] specify the seed to randomforestregressor test
e1b947f [Holden Karau] Style fixes
ce90ec8 [Holden Karau] merge in master
bcdf3c9 [Holden Karau] update docstring seeds to none and some other default seeds from 42
65eba21 [Holden Karau] pep8 fixes
0e3797e [Holden Karau] Make seed default to random in more places
213a543 [Holden Karau] Simplify the generated code to only include set default if there is a default rather than having None is note None in the generated code
1ff17c2 [Holden Karau] Make the seed random for HasSeed in python
(cherry picked from commit 191ee47452)
Signed-off-by: Joseph K. Bradley <joseph@databricks.com>
583 lines
24 KiB
Python
583 lines
24 KiB
Python
#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from pyspark.ml.util import keyword_only
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from pyspark.ml.wrapper import JavaEstimator, JavaModel
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from pyspark.ml.param.shared import *
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from pyspark.ml.regression import RandomForestParams
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from pyspark.mllib.common import inherit_doc
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__all__ = ['LogisticRegression', 'LogisticRegressionModel', 'DecisionTreeClassifier',
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'DecisionTreeClassificationModel', 'GBTClassifier', 'GBTClassificationModel',
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'RandomForestClassifier', 'RandomForestClassificationModel']
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@inherit_doc
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class LogisticRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol, HasMaxIter,
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HasRegParam, HasTol, HasProbabilityCol):
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"""
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Logistic regression.
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>>> from pyspark.sql import Row
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>>> from pyspark.mllib.linalg import Vectors
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>>> df = sc.parallelize([
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... Row(label=1.0, features=Vectors.dense(1.0)),
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... Row(label=0.0, features=Vectors.sparse(1, [], []))]).toDF()
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>>> lr = LogisticRegression(maxIter=5, regParam=0.01)
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>>> model = lr.fit(df)
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>>> test0 = sc.parallelize([Row(features=Vectors.dense(-1.0))]).toDF()
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>>> model.transform(test0).head().prediction
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0.0
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>>> model.weights
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DenseVector([5.5...])
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>>> model.intercept
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-2.68...
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>>> test1 = sc.parallelize([Row(features=Vectors.sparse(1, [0], [1.0]))]).toDF()
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>>> model.transform(test1).head().prediction
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1.0
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>>> lr.setParams("vector")
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Traceback (most recent call last):
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...
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TypeError: Method setParams forces keyword arguments.
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"""
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# a placeholder to make it appear in the generated doc
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elasticNetParam = \
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Param(Params._dummy(), "elasticNetParam",
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"the ElasticNet mixing parameter, in range [0, 1]. For alpha = 0, " +
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"the penalty is an L2 penalty. For alpha = 1, it is an L1 penalty.")
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fitIntercept = Param(Params._dummy(), "fitIntercept", "whether to fit an intercept term.")
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threshold = Param(Params._dummy(), "threshold",
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"threshold in binary classification prediction, in range [0, 1].")
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@keyword_only
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def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
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maxIter=100, regParam=0.1, elasticNetParam=0.0, tol=1e-6, fitIntercept=True,
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threshold=0.5, probabilityCol="probability"):
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"""
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__init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
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maxIter=100, regParam=0.1, elasticNetParam=0.0, tol=1e-6, fitIntercept=True, \
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threshold=0.5, probabilityCol="probability")
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"""
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super(LogisticRegression, self).__init__()
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self._java_obj = self._new_java_obj(
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"org.apache.spark.ml.classification.LogisticRegression", self.uid)
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#: param for the ElasticNet mixing parameter, in range [0, 1]. For alpha = 0, the penalty
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# is an L2 penalty. For alpha = 1, it is an L1 penalty.
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self.elasticNetParam = \
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Param(self, "elasticNetParam",
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"the ElasticNet mixing parameter, in range [0, 1]. For alpha = 0, the penalty " +
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"is an L2 penalty. For alpha = 1, it is an L1 penalty.")
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#: param for whether to fit an intercept term.
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self.fitIntercept = Param(self, "fitIntercept", "whether to fit an intercept term.")
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#: param for threshold in binary classification prediction, in range [0, 1].
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self.threshold = Param(self, "threshold",
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"threshold in binary classification prediction, in range [0, 1].")
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self._setDefault(maxIter=100, regParam=0.1, elasticNetParam=0.0, tol=1E-6,
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fitIntercept=True, threshold=0.5)
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kwargs = self.__init__._input_kwargs
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self.setParams(**kwargs)
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@keyword_only
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def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
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maxIter=100, regParam=0.1, elasticNetParam=0.0, tol=1e-6, fitIntercept=True,
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threshold=0.5, probabilityCol="probability"):
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"""
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setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
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maxIter=100, regParam=0.1, elasticNetParam=0.0, tol=1e-6, fitIntercept=True, \
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threshold=0.5, probabilityCol="probability")
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Sets params for logistic regression.
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"""
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kwargs = self.setParams._input_kwargs
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return self._set(**kwargs)
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def _create_model(self, java_model):
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return LogisticRegressionModel(java_model)
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def setElasticNetParam(self, value):
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"""
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Sets the value of :py:attr:`elasticNetParam`.
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"""
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self._paramMap[self.elasticNetParam] = value
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return self
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def getElasticNetParam(self):
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"""
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Gets the value of elasticNetParam or its default value.
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"""
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return self.getOrDefault(self.elasticNetParam)
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def setFitIntercept(self, value):
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"""
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Sets the value of :py:attr:`fitIntercept`.
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"""
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self._paramMap[self.fitIntercept] = value
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return self
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def getFitIntercept(self):
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"""
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Gets the value of fitIntercept or its default value.
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"""
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return self.getOrDefault(self.fitIntercept)
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def setThreshold(self, value):
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"""
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Sets the value of :py:attr:`threshold`.
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"""
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self._paramMap[self.threshold] = value
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return self
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def getThreshold(self):
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"""
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Gets the value of threshold or its default value.
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"""
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return self.getOrDefault(self.threshold)
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class LogisticRegressionModel(JavaModel):
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"""
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Model fitted by LogisticRegression.
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"""
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@property
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def weights(self):
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"""
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Model weights.
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"""
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return self._call_java("weights")
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@property
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def intercept(self):
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"""
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Model intercept.
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"""
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return self._call_java("intercept")
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class TreeClassifierParams(object):
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"""
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Private class to track supported impurity measures.
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"""
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supportedImpurities = ["entropy", "gini"]
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class GBTParams(object):
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"""
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Private class to track supported GBT params.
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"""
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supportedLossTypes = ["logistic"]
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@inherit_doc
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class DecisionTreeClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol,
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DecisionTreeParams, HasCheckpointInterval):
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"""
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`http://en.wikipedia.org/wiki/Decision_tree_learning Decision tree`
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learning algorithm for classification.
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It supports both binary and multiclass labels, as well as both continuous and categorical
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features.
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>>> from pyspark.mllib.linalg import Vectors
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>>> from pyspark.ml.feature import StringIndexer
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>>> df = sqlContext.createDataFrame([
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... (1.0, Vectors.dense(1.0)),
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... (0.0, Vectors.sparse(1, [], []))], ["label", "features"])
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>>> stringIndexer = StringIndexer(inputCol="label", outputCol="indexed")
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>>> si_model = stringIndexer.fit(df)
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>>> td = si_model.transform(df)
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>>> dt = DecisionTreeClassifier(maxDepth=2, labelCol="indexed")
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>>> model = dt.fit(td)
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>>> test0 = sqlContext.createDataFrame([(Vectors.dense(-1.0),)], ["features"])
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>>> model.transform(test0).head().prediction
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0.0
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>>> test1 = sqlContext.createDataFrame([(Vectors.sparse(1, [0], [1.0]),)], ["features"])
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>>> model.transform(test1).head().prediction
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1.0
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"""
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# a placeholder to make it appear in the generated doc
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impurity = Param(Params._dummy(), "impurity",
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"Criterion used for information gain calculation (case-insensitive). " +
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"Supported options: " + ", ".join(TreeClassifierParams.supportedImpurities))
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@keyword_only
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def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
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maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
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maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, impurity="gini"):
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"""
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__init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
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maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0, \
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maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, impurity="gini")
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"""
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super(DecisionTreeClassifier, self).__init__()
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self._java_obj = self._new_java_obj(
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"org.apache.spark.ml.classification.DecisionTreeClassifier", self.uid)
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#: param for Criterion used for information gain calculation (case-insensitive).
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self.impurity = \
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Param(self, "impurity",
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"Criterion used for information gain calculation (case-insensitive). " +
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"Supported options: " + ", ".join(TreeClassifierParams.supportedImpurities))
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self._setDefault(maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
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maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
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impurity="gini")
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kwargs = self.__init__._input_kwargs
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self.setParams(**kwargs)
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@keyword_only
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def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
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maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
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maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
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impurity="gini"):
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"""
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setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
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maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0, \
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maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, impurity="gini")
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Sets params for the DecisionTreeClassifier.
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"""
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kwargs = self.setParams._input_kwargs
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return self._set(**kwargs)
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def _create_model(self, java_model):
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return DecisionTreeClassificationModel(java_model)
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def setImpurity(self, value):
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"""
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Sets the value of :py:attr:`impurity`.
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"""
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self._paramMap[self.impurity] = value
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return self
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def getImpurity(self):
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"""
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Gets the value of impurity or its default value.
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"""
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return self.getOrDefault(self.impurity)
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class DecisionTreeClassificationModel(JavaModel):
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"""
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Model fitted by DecisionTreeClassifier.
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"""
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@inherit_doc
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class RandomForestClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol, HasSeed,
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DecisionTreeParams, HasCheckpointInterval):
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"""
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`http://en.wikipedia.org/wiki/Random_forest Random Forest`
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learning algorithm for classification.
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It supports both binary and multiclass labels, as well as both continuous and categorical
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features.
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>>> from pyspark.mllib.linalg import Vectors
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>>> from pyspark.ml.feature import StringIndexer
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>>> df = sqlContext.createDataFrame([
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... (1.0, Vectors.dense(1.0)),
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... (0.0, Vectors.sparse(1, [], []))], ["label", "features"])
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>>> stringIndexer = StringIndexer(inputCol="label", outputCol="indexed")
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>>> si_model = stringIndexer.fit(df)
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>>> td = si_model.transform(df)
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>>> rf = RandomForestClassifier(numTrees=2, maxDepth=2, labelCol="indexed", seed=42)
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>>> model = rf.fit(td)
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>>> test0 = sqlContext.createDataFrame([(Vectors.dense(-1.0),)], ["features"])
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>>> model.transform(test0).head().prediction
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0.0
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>>> test1 = sqlContext.createDataFrame([(Vectors.sparse(1, [0], [1.0]),)], ["features"])
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>>> model.transform(test1).head().prediction
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1.0
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"""
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# a placeholder to make it appear in the generated doc
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impurity = Param(Params._dummy(), "impurity",
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"Criterion used for information gain calculation (case-insensitive). " +
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"Supported options: " + ", ".join(TreeClassifierParams.supportedImpurities))
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subsamplingRate = Param(Params._dummy(), "subsamplingRate",
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"Fraction of the training data used for learning each decision tree, " +
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"in range (0, 1].")
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numTrees = Param(Params._dummy(), "numTrees", "Number of trees to train (>= 1)")
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featureSubsetStrategy = \
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Param(Params._dummy(), "featureSubsetStrategy",
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"The number of features to consider for splits at each tree node. Supported " +
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"options: " + ", ".join(RandomForestParams.supportedFeatureSubsetStrategies))
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@keyword_only
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def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
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maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
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maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, impurity="gini",
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numTrees=20, featureSubsetStrategy="auto", seed=None):
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"""
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__init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
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maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0, \
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maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, impurity="gini", \
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numTrees=20, featureSubsetStrategy="auto", seed=None)
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"""
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super(RandomForestClassifier, self).__init__()
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self._java_obj = self._new_java_obj(
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"org.apache.spark.ml.classification.RandomForestClassifier", self.uid)
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#: param for Criterion used for information gain calculation (case-insensitive).
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self.impurity = \
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Param(self, "impurity",
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"Criterion used for information gain calculation (case-insensitive). " +
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"Supported options: " + ", ".join(TreeClassifierParams.supportedImpurities))
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#: param for Fraction of the training data used for learning each decision tree,
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# in range (0, 1]
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self.subsamplingRate = Param(self, "subsamplingRate",
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"Fraction of the training data used for learning each " +
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"decision tree, in range (0, 1].")
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#: param for Number of trees to train (>= 1)
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self.numTrees = Param(self, "numTrees", "Number of trees to train (>= 1)")
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#: param for The number of features to consider for splits at each tree node
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self.featureSubsetStrategy = \
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Param(self, "featureSubsetStrategy",
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"The number of features to consider for splits at each tree node. Supported " +
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"options: " + ", ".join(RandomForestParams.supportedFeatureSubsetStrategies))
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self._setDefault(maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
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maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, seed=None,
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impurity="gini", numTrees=20, featureSubsetStrategy="auto")
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kwargs = self.__init__._input_kwargs
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self.setParams(**kwargs)
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@keyword_only
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def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
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maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
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maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, seed=None,
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impurity="gini", numTrees=20, featureSubsetStrategy="auto"):
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"""
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setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
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maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0, \
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maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, seed=None, \
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impurity="gini", numTrees=20, featureSubsetStrategy="auto")
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Sets params for linear classification.
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"""
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kwargs = self.setParams._input_kwargs
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return self._set(**kwargs)
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def _create_model(self, java_model):
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return RandomForestClassificationModel(java_model)
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def setImpurity(self, value):
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"""
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Sets the value of :py:attr:`impurity`.
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"""
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self._paramMap[self.impurity] = value
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return self
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def getImpurity(self):
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"""
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Gets the value of impurity or its default value.
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"""
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return self.getOrDefault(self.impurity)
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def setSubsamplingRate(self, value):
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"""
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Sets the value of :py:attr:`subsamplingRate`.
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"""
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self._paramMap[self.subsamplingRate] = value
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return self
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def getSubsamplingRate(self):
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"""
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Gets the value of subsamplingRate or its default value.
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"""
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return self.getOrDefault(self.subsamplingRate)
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def setNumTrees(self, value):
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"""
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Sets the value of :py:attr:`numTrees`.
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"""
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self._paramMap[self.numTrees] = value
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return self
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def getNumTrees(self):
|
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"""
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Gets the value of numTrees or its default value.
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"""
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return self.getOrDefault(self.numTrees)
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def setFeatureSubsetStrategy(self, value):
|
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"""
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Sets the value of :py:attr:`featureSubsetStrategy`.
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"""
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self._paramMap[self.featureSubsetStrategy] = value
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return self
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def getFeatureSubsetStrategy(self):
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"""
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Gets the value of featureSubsetStrategy or its default value.
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"""
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return self.getOrDefault(self.featureSubsetStrategy)
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|
|
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class RandomForestClassificationModel(JavaModel):
|
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"""
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|
Model fitted by RandomForestClassifier.
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|
"""
|
|
|
|
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|
@inherit_doc
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class GBTClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol, HasMaxIter,
|
|
DecisionTreeParams, HasCheckpointInterval):
|
|
"""
|
|
`http://en.wikipedia.org/wiki/Gradient_boosting Gradient-Boosted Trees (GBTs)`
|
|
learning algorithm for classification.
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|
It supports binary labels, as well as both continuous and categorical features.
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|
Note: Multiclass labels are not currently supported.
|
|
|
|
>>> from pyspark.mllib.linalg import Vectors
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>>> from pyspark.ml.feature import StringIndexer
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|
>>> df = sqlContext.createDataFrame([
|
|
... (1.0, Vectors.dense(1.0)),
|
|
... (0.0, Vectors.sparse(1, [], []))], ["label", "features"])
|
|
>>> stringIndexer = StringIndexer(inputCol="label", outputCol="indexed")
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>>> si_model = stringIndexer.fit(df)
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>>> td = si_model.transform(df)
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>>> gbt = GBTClassifier(maxIter=5, maxDepth=2, labelCol="indexed")
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>>> model = gbt.fit(td)
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|
>>> test0 = sqlContext.createDataFrame([(Vectors.dense(-1.0),)], ["features"])
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|
>>> model.transform(test0).head().prediction
|
|
0.0
|
|
>>> test1 = sqlContext.createDataFrame([(Vectors.sparse(1, [0], [1.0]),)], ["features"])
|
|
>>> model.transform(test1).head().prediction
|
|
1.0
|
|
"""
|
|
|
|
# a placeholder to make it appear in the generated doc
|
|
lossType = Param(Params._dummy(), "lossType",
|
|
"Loss function which GBT tries to minimize (case-insensitive). " +
|
|
"Supported options: " + ", ".join(GBTParams.supportedLossTypes))
|
|
subsamplingRate = Param(Params._dummy(), "subsamplingRate",
|
|
"Fraction of the training data used for learning each decision tree, " +
|
|
"in range (0, 1].")
|
|
stepSize = Param(Params._dummy(), "stepSize",
|
|
"Step size (a.k.a. learning rate) in interval (0, 1] for shrinking the " +
|
|
"contribution of each estimator")
|
|
|
|
@keyword_only
|
|
def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
|
|
maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
|
|
maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, lossType="logistic",
|
|
maxIter=20, stepSize=0.1):
|
|
"""
|
|
__init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
|
|
maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0, \
|
|
maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, \
|
|
lossType="logistic", maxIter=20, stepSize=0.1)
|
|
"""
|
|
super(GBTClassifier, self).__init__()
|
|
self._java_obj = self._new_java_obj(
|
|
"org.apache.spark.ml.classification.GBTClassifier", self.uid)
|
|
#: param for Loss function which GBT tries to minimize (case-insensitive).
|
|
self.lossType = Param(self, "lossType",
|
|
"Loss function which GBT tries to minimize (case-insensitive). " +
|
|
"Supported options: " + ", ".join(GBTParams.supportedLossTypes))
|
|
#: Fraction of the training data used for learning each decision tree, in range (0, 1].
|
|
self.subsamplingRate = Param(self, "subsamplingRate",
|
|
"Fraction of the training data used for learning each " +
|
|
"decision tree, in range (0, 1].")
|
|
#: Step size (a.k.a. learning rate) in interval (0, 1] for shrinking the contribution of
|
|
# each estimator
|
|
self.stepSize = Param(self, "stepSize",
|
|
"Step size (a.k.a. learning rate) in interval (0, 1] for shrinking " +
|
|
"the contribution of each estimator")
|
|
self._setDefault(maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
|
|
maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
|
|
lossType="logistic", maxIter=20, stepSize=0.1)
|
|
kwargs = self.__init__._input_kwargs
|
|
self.setParams(**kwargs)
|
|
|
|
@keyword_only
|
|
def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
|
|
maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
|
|
maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
|
|
lossType="logistic", maxIter=20, stepSize=0.1):
|
|
"""
|
|
setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
|
|
maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0, \
|
|
maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, \
|
|
lossType="logistic", maxIter=20, stepSize=0.1)
|
|
Sets params for Gradient Boosted Tree Classification.
|
|
"""
|
|
kwargs = self.setParams._input_kwargs
|
|
return self._set(**kwargs)
|
|
|
|
def _create_model(self, java_model):
|
|
return GBTClassificationModel(java_model)
|
|
|
|
def setLossType(self, value):
|
|
"""
|
|
Sets the value of :py:attr:`lossType`.
|
|
"""
|
|
self._paramMap[self.lossType] = value
|
|
return self
|
|
|
|
def getLossType(self):
|
|
"""
|
|
Gets the value of lossType or its default value.
|
|
"""
|
|
return self.getOrDefault(self.lossType)
|
|
|
|
def setSubsamplingRate(self, value):
|
|
"""
|
|
Sets the value of :py:attr:`subsamplingRate`.
|
|
"""
|
|
self._paramMap[self.subsamplingRate] = value
|
|
return self
|
|
|
|
def getSubsamplingRate(self):
|
|
"""
|
|
Gets the value of subsamplingRate or its default value.
|
|
"""
|
|
return self.getOrDefault(self.subsamplingRate)
|
|
|
|
def setStepSize(self, value):
|
|
"""
|
|
Sets the value of :py:attr:`stepSize`.
|
|
"""
|
|
self._paramMap[self.stepSize] = value
|
|
return self
|
|
|
|
def getStepSize(self):
|
|
"""
|
|
Gets the value of stepSize or its default value.
|
|
"""
|
|
return self.getOrDefault(self.stepSize)
|
|
|
|
|
|
class GBTClassificationModel(JavaModel):
|
|
"""
|
|
Model fitted by GBTClassifier.
|
|
"""
|
|
|
|
|
|
if __name__ == "__main__":
|
|
import doctest
|
|
from pyspark.context import SparkContext
|
|
from pyspark.sql import SQLContext
|
|
globs = globals().copy()
|
|
# The small batch size here ensures that we see multiple batches,
|
|
# even in these small test examples:
|
|
sc = SparkContext("local[2]", "ml.classification tests")
|
|
sqlContext = SQLContext(sc)
|
|
globs['sc'] = sc
|
|
globs['sqlContext'] = sqlContext
|
|
(failure_count, test_count) = doctest.testmod(
|
|
globs=globs, optionflags=doctest.ELLIPSIS)
|
|
sc.stop()
|
|
if failure_count:
|
|
exit(-1)
|