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Java Data Science Cookbook

You're reading from   Java Data Science Cookbook Explore the power of MLlib, DL4j, Weka, and more

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781787122536
Length 372 pages
Edition 1st Edition
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Author (1):
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Rushdi Shams Rushdi Shams
Author Profile Icon Rushdi Shams
Rushdi Shams
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Toc

Table of Contents (10) Chapters Close

Preface 1. Obtaining and Cleaning Data FREE CHAPTER 2. Indexing and Searching Data 3. Analyzing Data Statistically 4. Learning from Data - Part 1 5. Learning from Data - Part 2 6. Retrieving Information from Text Data 7. Handling Big Data 8. Learn Deeply from Data 9. Visualizing Data

Creating and saving an Attribute-Relation File Format (ARFF) file

Weka's native file format is called Attribute-Relation File Format (ARFF). There are two logical parts of an ARFF file. The first part is called header, and the second part is called data . The header part has three physical sections that must be present in an ARFF file--the name of the relation, the attributes or features, and their data types and ranges. The data part has one physical section that must also be present to generate a machine-learning model. The header part of an ARFF file looks like the following:

% 1. Title: Iris Plants Database 
   % 
   % 2. Sources: 
   %      (a) Creator: R.A. Fisher 
   %      (b) Donor: Michael Marshall (MARSHALL%PLU@io.arc.nasa.gov) 
   %      (c) Date: July, 1988 
   % 
   @RELATION iris 
 
   @ATTRIBUTE sepallength     NUMERIC 
   @ATTRIBUTE sepalwidth      NUMERIC 
   @ATTRIBUTE petallength     NUMERIC 
   @ATTRIBUTE petalwidth      NUMERIC 
   @ATTRIBUTE class  {Iris-setosa...
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