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Diffstat (limited to 'examples/src/main/python/ml/dct_example.py')
-rw-r--r-- | examples/src/main/python/ml/dct_example.py | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/examples/src/main/python/ml/dct_example.py b/examples/src/main/python/ml/dct_example.py new file mode 100644 index 0000000000..264d47f404 --- /dev/null +++ b/examples/src/main/python/ml/dct_example.py @@ -0,0 +1,45 @@ +# +# 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 DCT +from pyspark.mllib.linalg import Vectors +# $example off$ + +if __name__ == "__main__": + sc = SparkContext(appName="DCTExample") + sqlContext = SQLContext(sc) + + # $example on$ + df = sqlContext.createDataFrame([ + (Vectors.dense([0.0, 1.0, -2.0, 3.0]),), + (Vectors.dense([-1.0, 2.0, 4.0, -7.0]),), + (Vectors.dense([14.0, -2.0, -5.0, 1.0]),)], ["features"]) + + dct = DCT(inverse=False, inputCol="features", outputCol="featuresDCT") + + dctDf = dct.transform(df) + + for dcts in dctDf.select("featuresDCT").take(3): + print(dcts) + # $example off$ + + sc.stop() |