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Diffstat (limited to 'examples/src/main/python/mllib/random_rdd_generation.py')
-rwxr-xr-x | examples/src/main/python/mllib/random_rdd_generation.py | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/examples/src/main/python/mllib/random_rdd_generation.py b/examples/src/main/python/mllib/random_rdd_generation.py new file mode 100755 index 0000000000..b388d8d83f --- /dev/null +++ b/examples/src/main/python/mllib/random_rdd_generation.py @@ -0,0 +1,55 @@ +# +# 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. +# + +""" +Randomly generated RDDs. +""" + +import sys + +from pyspark import SparkContext +from pyspark.mllib.random import RandomRDDs + + +if __name__ == "__main__": + if len(sys.argv) not in [1, 2]: + print >> sys.stderr, "Usage: random_rdd_generation" + exit(-1) + + sc = SparkContext(appName="PythonRandomRDDGeneration") + + numExamples = 10000 # number of examples to generate + fraction = 0.1 # fraction of data to sample + + # Example: RandomRDDs.normalRDD + normalRDD = RandomRDDs.normalRDD(sc, numExamples) + print 'Generated RDD of %d examples sampled from the standard normal distribution'\ + % normalRDD.count() + print ' First 5 samples:' + for sample in normalRDD.take(5): + print ' ' + str(sample) + print + + # Example: RandomRDDs.normalVectorRDD + normalVectorRDD = RandomRDDs.normalVectorRDD(sc, numRows = numExamples, numCols = 2) + print 'Generated RDD of %d examples of length-2 vectors.' % normalVectorRDD.count() + print ' First 5 samples:' + for sample in normalVectorRDD.take(5): + print ' ' + str(sample) + print + + sc.stop() |