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author | Zheng RuiFeng <ruifengz@foxmail.com> | 2016-03-11 09:21:12 +0200 |
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committer | Nick Pentreath <nick.pentreath@gmail.com> | 2016-03-11 09:21:12 +0200 |
commit | d18276cb1d82790a402960835e112aebd0c55513 (patch) | |
tree | ff81f8825b43733b53e7160d1d168171653e6191 /examples/src/main/python/ml | |
parent | e33bc67c8f936b7e0e4b94741794e162c0f402d3 (diff) | |
download | spark-d18276cb1d82790a402960835e112aebd0c55513.tar.gz spark-d18276cb1d82790a402960835e112aebd0c55513.tar.bz2 spark-d18276cb1d82790a402960835e112aebd0c55513.zip |
[SPARK-13672][ML] Add python examples of BisectingKMeans in ML and MLLIB
JIRA: https://issues.apache.org/jira/browse/SPARK-13672
## What changes were proposed in this pull request?
add two python examples of BisectingKMeans for ml and mllib
## How was this patch tested?
manual tests
Author: Zheng RuiFeng <ruifengz@foxmail.com>
Closes #11515 from zhengruifeng/mllib_bkm_pe.
Diffstat (limited to 'examples/src/main/python/ml')
-rw-r--r-- | examples/src/main/python/ml/bisecting_k_means_example.py | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/examples/src/main/python/ml/bisecting_k_means_example.py b/examples/src/main/python/ml/bisecting_k_means_example.py new file mode 100644 index 0000000000..e6f6bfd7e8 --- /dev/null +++ b/examples/src/main/python/ml/bisecting_k_means_example.py @@ -0,0 +1,57 @@ +# +# 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 +# $example on$ +from pyspark.ml.clustering import BisectingKMeans, BisectingKMeansModel +from pyspark.mllib.linalg import VectorUDT, _convert_to_vector, Vectors +from pyspark.mllib.linalg import Vectors +from pyspark.sql.types import Row +# $example off$ +from pyspark.sql import SQLContext + +""" +A simple example demonstrating a bisecting k-means clustering. +""" + +if __name__ == "__main__": + + sc = SparkContext(appName="PythonBisectingKMeansExample") + sqlContext = SQLContext(sc) + + # $example on$ + data = sc.textFile("data/mllib/kmeans_data.txt") + parsed = data.map(lambda l: Row(features=Vectors.dense([float(x) for x in l.split(' ')]))) + training = sqlContext.createDataFrame(parsed) + + kmeans = BisectingKMeans().setK(2).setSeed(1).setFeaturesCol("features") + + model = kmeans.fit(training) + + # Evaluate clustering + cost = model.computeCost(training) + print("Bisecting K-means Cost = " + str(cost)) + + centers = model.clusterCenters() + print("Cluster Centers: ") + for center in centers: + print(center) + # $example off$ + + sc.stop() |