Using OpenRefine : the essential OpenRefine guide that takes you from data analysis and error fixing to linking your dataset to the Web / Ruben Verborgh, Max De Wilde ; cover image by Aniket Sawant.

Format:

Book

Author/Creator:

Verborgh, Ruben, author.

De Wilde, Max, author.

Contributor:

Sawant, Aniket, cover designer.

Series:

Community experience distilled.

Community Experience Distilled

Language:

English

Subjects (All):

Data mining.

Electronic data processing.

Physical Description:

1 online resource (114 p.)

Edition:

1st edition

Place of Publication:

Birmingham, England : Packt Publishing, 2013.

Language Note:

English

System Details:

Mode of access: World Wide Web.

text file

Summary:

With this book on OpenRefine, managing and cleaning your large datasets suddenly got a lot easier! With a cookbook approach and free datasheets included, you’ll quickly and painlessly improve your data managing capabilities. Create links between your dataset and others in an instant Effectively transform data with regular expressions and the General Refine Expression Language Spot issues in your dataset and take effective action with just a few clicks In Detail Data is supposed to be the new gold, but how can you unlock the value in your data? Managing large datasets used to be a task for specialists, but you don't have to worry about inconsistencies or errors anymore. OpenRefine lets you clean, link, and publish your dataset in a breeze. Using OpenRefine takes you on a practical tour of all the handy features of this well-known data transformation tool. It is a hands-on recipe book that teaches you data techniques by example. Starting from the basics, it gradually transforms you into an OpenRefine expert. This book will teach you all the necessary skills to handle any large dataset and to turn it into high-quality data for the Web. After you learn how to analyze data and spot issues, we'll see how we can solve them to obtain a clean dataset. Messy and inconsistent data is recovered through advanced techniques such as automated clustering. We'll then show extract links from keyword and full-text fields using reconciliation and named-entity extraction. Using OpenRefine is more than a manual: it's a guide stuffed with tips and tricks to get the best out of your data.

Contents:

Intro

Using OpenRefine

Table of Contents

Credits

Foreword

About the Authors

About the Reviewers

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Why Subscribe?

Free Access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example files

Errata

Piracy

Questions

1. Diving Into OpenRefine

Introducing OpenRefine

Recipe 1 - installing OpenRefine

Windows

Mac

Linux

Recipe 2 - creating a new project

File formats supported by OpenRefine

Recipe 3 - exploring your data

Recipe 4 - manipulating columns

Collapsing and expanding columns

Moving columns around

Renaming and removing columns

Recipe 5 - using the project history

Recipe 6 - exporting a project

Recipe 7 - going for more memory

Summary

2. Analyzing and Fixing Data

Recipe 1 - sorting data

Reordering rows

Recipe 2 - faceting data

Text facets

Numeric facets

Customized facets

Faceting by star or flag

Recipe 3 - detecting duplicates

Recipe 4 - applying a text filter

Recipe 5 - using simple cell transformations

Recipe 6 - removing matching rows

3. Advanced Data Operations

Recipe 1 - handling multi-valued cells

Recipe 2 - alternating between rows and records mode

Recipe 3 - clustering similar cells

Recipe 4 - transforming cell values

Recipe 5 - adding derived columns

Recipe 6 - splitting data across columns

Recipe 7 - transposing rows and columns

4. Linking Datasets

Recipe 1 - reconciling values with Freebase

Recipe 2 - installing extensions

Recipe 3 - adding a reconciliation service

Recipe 4 - reconciling with Linked Data.

Recipe 5 - extracting named entities

A. Regular Expressions and GREL

Regular expressions for text patterns

Character classes

Quantifiers

Anchors

Choices

Groups

Overview

General Refine Expression Language (GREL)

Transforming data

Creating custom facets

Solving problems with GREL

Index.

Notes:

Includes index.

Includes bibliographical references and index.

Description based on online resource; title from PDF title page (ebrary, viewed August 11, 2014).

ISBN:

9781783289097

1783289090

OCLC:

889271264