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James Church - Getting Started with Haskell Data Analysis

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Put your Haskell skills to work and generate publication-ready visualizations in no time at allKey FeaturesTake your data analysis skills to the next level using the power of HaskellUnderstand regression analysis, perform multivariate regression, and untangle different cluster varietiesCreate publication-ready visualizations of dataBook DescriptionEvery business and organization that collects data is capable of tapping into its own data to gain insights how to improve. Haskell is a purely functional and lazy programming language, well-suited to handling large data analysis problems. This book will take you through the more difficult problems of data analysis in a hands-on manner.This book will help you get up-to-speed with the basics of data analysis and approaches in the Haskell language. Youll learn about statistical computing, file formats (CSV and SQLite3), descriptive statistics, charts, and progress to more advanced concepts such as understanding the importance of normal distribution. While mathematics is a big part of data analysis, weve tried to keep this course simple and approachable so that you can apply what you learn to the real world.By the end of this book, you will have a thorough understanding of data analysis, and the different ways of analyzing data. You will have a mastery of all the tools and techniques in Haskell for effective data analysis.What you will learnLearn to parse a CSV file and read data into the Haskell environmentCreate Haskell functions for common descriptive statistics functionsCreate an SQLite3 database using an existing CSV fileLearn the versatility of SELECT queries for slicing data into smaller chunksApply regular expressions in large-scale datasets using both CSV and SQLite3 filesCreate a Kernel Density Estimator visualization using normal distributionWho this book is forThis book is intended for people who wish to expand their knowledge of statistics and data analysis via real-world examples. A basic understanding of the Haskell language is expected. If you are feeling brave, you can jump right into the functional programming style.

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Getting Started with Haskell Data Analysis Put your data analysis - photo 1
Getting Started with Haskell Data Analysis
Put your data analysis techniques to work and generate publication-ready visualizations
James Church

BIRMINGHAM - MUMBAI Getting Started with Haskell Data Analysis Copyright 2018 - photo 2

BIRMINGHAM - MUMBAI
Getting Started with Haskell Data Analysis

Copyright 2018 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing or its dealers and distributors, will be held liable for any damages caused or alleged to have been caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

Commissioning Editor: Amey Varangaonkar
Acquisition Editor: Trusha Shriyan
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Graphics: Alishon Mendonsa
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First published: October 2018

Production reference: 1301018

Published by Packt Publishing Ltd.
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ISBN 978-1-78980-286-3

www.packtpub.com

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Contributors
About the author

James Church lives in Clarksville, Tennessee, United States, where he enjoys teaching, programming, and playing board games with his wife, Michelle. He is an assistant professor of computer science at Austin Peay State University. He has consulted for various companies and a chemical laboratory for the purpose of performing data analysis work. James is the author of Learning Haskell Data Analysis.

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Preface

Data analysis is part computer science and part statistics. An important part of data analysis is validating your assumptions with real-world data to see whether there is a pattern, or a particular user behavior that you can validate.

In this book, we are going to learn about data analysis from the perspective of the Haskell programming language. The goal of this book is to take you from being a beginner in math and statistics, to the point that you feel comfortable working with large-scale datasets. While mathematics is a big part of data analysis, we've tried to keep this book simple and approachable so that you can apply what you learn to the real world.

Who this book is for

This book is intended for people who wish to expand their knowledge of statistics and data analysis via real-world examples. A basic understanding of the Haskell language is expected. If you are feeling brave, you can jump right into a functional programming style.

What this book covers

, Descriptive Statistics , teaches you about the Text.CSV library. It also covers some of the descriptive statistics functions, such as mean, median, and mode.

, SQLite3 , focuses on how to get the data from CSV into SQLite3. You will understand the data types of SQLite3 and how to fetch data using SQL statements. It also covers how to create your own custom module of descriptive statistics.

, Regular Expressions , introduces you to regular expression syntax, such as dots and pipe. It also covers character classes at length. Finally, it teaches you how to use regular expressions within a CSV file and an SQLite3 database.

, Visualizations , starts with the installation of gnuplot and the EasyPlot Haskell library. It covers how to use moving average function to analyze stock data. Finally, it teaches you how to make publication-ready plots by adding legends and saving those plots to files.

, Kernel Density Estimation , introduces you to central limit theorem and normal distribution and helps you to understand the difference between them. Later, it talks about the kernel density estimator and how to apply it to a dataset.

, Course review , works on the MovieLens data by applying what you have learned from the first five chapters. In addition to what was covered in the earlier chapters, you will also be exploring a few more interesting techniques for analyzing the data.

To get the most out of this book

You will need to set up the IHaskell notebook environment to test the examples in these chapters. You will also need some knowledge of the Haskell programming language, math, and statistics.

Download the example code files

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  3. Click on Code Downloads & Errata .
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