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Diffstat (limited to 'examples/src/main/python')
-rw-r--r-- | examples/src/main/python/ml/chisq_selector_example.py | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/examples/src/main/python/ml/chisq_selector_example.py b/examples/src/main/python/ml/chisq_selector_example.py new file mode 100644 index 0000000000..997a504735 --- /dev/null +++ b/examples/src/main/python/ml/chisq_selector_example.py @@ -0,0 +1,44 @@ +# +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +from __future__ import print_function + +from pyspark import SparkContext +from pyspark.sql import SQLContext +# $example on$ +from pyspark.ml.feature import ChiSqSelector +from pyspark.mllib.linalg import Vectors +# $example off$ + +if __name__ == "__main__": + sc = SparkContext(appName="ChiSqSelectorExample") + sqlContext = SQLContext(sc) + + # $example on$ + df = sqlContext.createDataFrame([ + (7, Vectors.dense([0.0, 0.0, 18.0, 1.0]), 1.0,), + (8, Vectors.dense([0.0, 1.0, 12.0, 0.0]), 0.0,), + (9, Vectors.dense([1.0, 0.0, 15.0, 0.1]), 0.0,)], ["id", "features", "clicked"]) + + selector = ChiSqSelector(numTopFeatures=1, featuresCol="features", + outputCol="selectedFeatures", labelCol="clicked") + + result = selector.fit(df).transform(df) + result.show() + # $example off$ + + sc.stop() |