Book Image

Clojure Data Analysis Cookbook

By : Eric Rochester
Book Image

Clojure Data Analysis Cookbook

By: Eric Rochester

Overview of this book

<p>Data is everywhere and it's increasingly important to be able to gain insights that we can act on. Using Clojure for data analysis and collection, this book will show you how to gain fresh insights and perspectives from your data with an essential collection of practical, structured recipes.<br /><br />"The Clojure Data Analysis Cookbook" presents recipes for every stage of the data analysis process. Whether scraping data off a web page, performing data mining, or creating graphs for the web, this book has something for the task at hand.<br /><br />You'll learn how to acquire data, clean it up, and transform it into useful graphs which can then be analyzed and published to the Internet. Coverage includes advanced topics like processing data concurrently, applying powerful statistical techniques like Bayesian modelling, and even data mining algorithms such as K-means clustering, neural networks, and association rules.</p>
Table of Contents (18 chapters)
Clojure Data Analysis Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Composing Cascalog queries


One of the nicest things about Cascalog queries is that they can be composed together. Like composing functions, this can be a nice way to build a complex process from smaller, easy-to-understand parts.

In this recipe, we'll parse the Virginia census data we first used in the Managing program complexity with STM recipe in Chapter 3, Managing Complexity with Concurrent Programming. You can download this data from http://www.ericrochester.com/clj-data-analysis/data/all_160_in_51.P35.csv. We'll also use a new census data file containing the race data. You can download it from http://www.ericrochester.com/clj-data-analysis/data/all_160_in_51.P3.csv.

Getting ready

Since we're reading a CSV file, we'll need to use the dependencies and imports from the Parsing CSV files with Cascalog recipe. We'll also use the hfs-text-delim function from that recipe. And we'll also need the data files from http://www.ericrochester.com/clj-data-analysis/data/all_160_in_51.P35.csv and http...