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

Using infix formulas in Incanter


There's a lot to like about lisp: macros, the simple syntax, and the rapid development cycle. Most of the time, it is fine that we treat math operators like functions and use prefix notation, which is a consistent, function-first syntax. This allows us to treat math operators the same as everything else so that we can pass them to reduce, or anything else we want to do.

But we're not taught to read math expressions using prefix notation (with the operator first). Especially when formulas get even a little complicated, tracing out exactly what's happening can get hairy.

Getting ready

For this, we'll just need Incanter in our project.clj file, so we'll use the dependencies statement—as well as the use statement—from the Loading Clojure data structures into datasets recipe.

For data, we'll use the matrix that we created in the Converting datasets to matrices recipe.

How to do it…

Incanter has a macro that converts standard math notation to lisp notation. We'll explore...