aboutsummaryrefslogtreecommitdiff
path: root/examples/src/main/python/ml/naive_bayes_example.py
diff options
context:
space:
mode:
Diffstat (limited to 'examples/src/main/python/ml/naive_bayes_example.py')
-rw-r--r--examples/src/main/python/ml/naive_bayes_example.py53
1 files changed, 53 insertions, 0 deletions
diff --git a/examples/src/main/python/ml/naive_bayes_example.py b/examples/src/main/python/ml/naive_bayes_example.py
new file mode 100644
index 0000000000..db8fbea9bf
--- /dev/null
+++ b/examples/src/main/python/ml/naive_bayes_example.py
@@ -0,0 +1,53 @@
+#
+# 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.classification import NaiveBayes
+from pyspark.ml.evaluation import MulticlassClassificationEvaluator
+# $example off$
+
+if __name__ == "__main__":
+
+ sc = SparkContext(appName="naive_bayes_example")
+ sqlContext = SQLContext(sc)
+
+ # $example on$
+ # Load training data
+ data = sqlContext.read.format("libsvm") \
+ .load("data/mllib/sample_libsvm_data.txt")
+ # Split the data into train and test
+ splits = data.randomSplit([0.6, 0.4], 1234)
+ train = splits[0]
+ test = splits[1]
+
+ # create the trainer and set its parameters
+ nb = NaiveBayes(smoothing=1.0, modelType="multinomial")
+
+ # train the model
+ model = nb.fit(train)
+ # compute precision on the test set
+ result = model.transform(test)
+ predictionAndLabels = result.select("prediction", "label")
+ evaluator = MulticlassClassificationEvaluator(metricName="precision")
+ print("Precision:" + str(evaluator.evaluate(predictionAndLabels)))
+ # $example off$
+
+ sc.stop()