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#
# 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 PolynomialExpansion
from pyspark.mllib.linalg import Vectors
# $example off$
if __name__ == "__main__":
sc = SparkContext(appName="PolynomialExpansionExample")
sqlContext = SQLContext(sc)
# $example on$
df = sqlContext.createDataFrame(
[(Vectors.dense([-2.0, 2.3]), ),
(Vectors.dense([0.0, 0.0]), ),
(Vectors.dense([0.6, -1.1]), )],
["features"])
px = PolynomialExpansion(degree=2, inputCol="features", outputCol="polyFeatures")
polyDF = px.transform(df)
for expanded in polyDF.select("polyFeatures").take(3):
print(expanded)
# $example off$
sc.stop()
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