sparkit-learn | PySpark + Scikit-learn = Sparkit-learn

by lensacom Python Version: Current License: Apache-2.0

X-Ray Key Features Code Snippets(2)Community Discussions(2)Vulnerabilities Install Support

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PySpark + Scikit-learn = Sparkit-learn

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sparkit-learn Examples and Code Snippets

How to convert spark sql dataframe to numpy array?

Python

Lines of Code : 13

License : Strong Copyleft (CC BY-SA 4.0)

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sqlContext.range(0, 10).toPandas().values  # .reshape(-1) for 1d array

array([[0],
       [1],
       [2],
       [3],
       [4],
       [5],
       [6],
       [7],
       [8],
       [9]])

type error when using Sparkit-Learn's SparkCountVectorizer()

Python

Lines of Code : 16

License : Strong Copyleft (CC BY-SA 4.0)

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my_rdd_of_rows = sc.parallelize([("some text ", )]).toDF(["columnoftexts"]).rdd

ArrayRDD(my_rdd_of_rows).first().shape

(1, 1)

ArrayRDD(sc.parallelize(["some text "]

Community Discussions

Trending Discussions on sparkit-learn

weird transpose behavior with Sparkit-Learn

type error when using Sparkit-Learn's SparkCountVectorizer()

QUESTION

weird transpose behavior with Sparkit-Learn

Asked 2017-Jan-27 at 13:00

I'm using Sparkit-Learn's SparkCountVectorizer and SparkTfidfVectorizer to convert a bunch of documents into a TFIDF matrix.

I get to create the TFIDF matrix and it has the correct dimensions (496,861 documents by 189,398 distinct tokens):

...

ANSWER

Answered 2017-Jan-27 at 13:00

You transpose a wrong thing. splearn.rdd.SparseRDD stores blocks of data, so you transpose blocks not individual vectors. If block has 7764 row and 18938 columns, then transposed one has 18938 rows and 7764 columns which will be iterated row by row when flattened.

What you need is:

Source https://stackoverflow.com/questions/41884144

QUESTION

type error when using Sparkit-Learn's SparkCountVectorizer()

Asked 2017-Jan-09 at 18:52

I want to use Sparkit-Learn to vectorize a collection of texts. I read the texts from SQL Server. What I get back is a DataFrame, which I convert to an RDD (as Sparkit-Learn doesn't handle DataFrames) and then to an ArrayRDD. Problem is, I get a type error when I try to vectorize the ArrayRDD:

...

ANSWER

Answered 2017-Jan-09 at 18:52

Then source of the problem is in front of your eyes. Let's simplify this a bit.

Source https://stackoverflow.com/questions/41553652

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