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Diffstat (limited to 'examples/src/main/python/mllib/kernel_density_estimation_example.py')
-rw-r--r-- | examples/src/main/python/mllib/kernel_density_estimation_example.py | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/examples/src/main/python/mllib/kernel_density_estimation_example.py b/examples/src/main/python/mllib/kernel_density_estimation_example.py new file mode 100644 index 0000000000..3e8f7241a4 --- /dev/null +++ b/examples/src/main/python/mllib/kernel_density_estimation_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 +# $example on$ +from pyspark.mllib.stat import KernelDensity +# $example off$ + +if __name__ == "__main__": + sc = SparkContext(appName="KernelDensityEstimationExample") # SparkContext + + # $example on$ + # an RDD of sample data + data = sc.parallelize([1.0, 1.0, 1.0, 2.0, 3.0, 4.0, 5.0, 5.0, 6.0, 7.0, 8.0, 9.0, 9.0]) + + # Construct the density estimator with the sample data and a standard deviation for the Gaussian + # kernels + kd = KernelDensity() + kd.setSample(data) + kd.setBandwidth(3.0) + + # Find density estimates for the given values + densities = kd.estimate([-1.0, 2.0, 5.0]) + # $example off$ + + print(densities) + + sc.stop() |