[SPARK-14509][DOC] Add python CountVectorizerExample
## What changes were proposed in this pull request? Add python CountVectorizerExample ## How was this patch tested? manual tests Author: Zheng RuiFeng <ruifengz@foxmail.com> Closes #11917 from zhengruifeng/cv_pe.
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@ -149,6 +149,15 @@ for more details on the API.
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{% include_example java/org/apache/spark/examples/ml/JavaCountVectorizerExample.java %}
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</div>
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<div data-lang="python" markdown="1">
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Refer to the [CountVectorizer Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.CountVectorizer)
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and the [CountVectorizerModel Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.CountVectorizerModel)
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for more details on the API.
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{% include_example python/ml/count_vectorizer_example.py %}
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</div>
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</div>
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# Feature Transformers
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examples/src/main/python/ml/count_vectorizer_example.py
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examples/src/main/python/ml/count_vectorizer_example.py
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from __future__ import print_function
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from pyspark import SparkContext
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from pyspark.sql import SQLContext
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# $example on$
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from pyspark.ml.feature import CountVectorizer
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# $example off$
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if __name__ == "__main__":
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sc = SparkContext(appName="CountVectorizerExample")
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sqlContext = SQLContext(sc)
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# $example on$
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# Input data: Each row is a bag of words with a ID.
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df = sqlContext.createDataFrame([
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(0, "a b c".split(" ")),
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(1, "a b b c a".split(" "))
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], ["id", "words"])
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# fit a CountVectorizerModel from the corpus.
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cv = CountVectorizer(inputCol="words", outputCol="features", vocabSize=3, minDF=2.0)
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model = cv.fit(df)
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result = model.transform(df)
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result.show()
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# $example off$
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sc.stop()
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