Getting Started with Haskell Data Analysis

By : Church

Buy this Book

Getting Started with Haskell Data Analysis

By: Church

Buy this Book

Overview of this book

Every 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. You'll 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, we've 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.

Preface

Who this book is for

What this book covers

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Free Chapter

Descriptive Statistics

The CSV library – working with CSV files

Data range

Data mean and standard deviation

Data median

Data mode

Summary

SQLite3

SQLite3 command line

Working with SQLite3 and Haskell

Slices of data

Working with SQLite3 and descriptive statistics

Summary

Regular Expressions

Dots and pipes

Atom and Atom modifiers

Character classes

Regular expressions in CSV files

SQLite3 and regular expressions

Summary

Visualizations

Line plots of a single variable

Plotting a moving average

Creating publication-ready plots

Feature scaling

Scatter plots

Summary

Kernel Density Estimation

The central limit theorem

Normal distribution

Introducing kernel density estimation

Application of the KDE

Summary

Course Review

Converting CSV variation files into SQLite3

Using SQLite3 SELECT and the DescriptiveStats module for descriptive statistics

Creating compelling visualizations using EasyPlot

Reintroducing kernel density estimation

Summary

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Working with SQLite3 and Haskell

In this section, we will talk about getting data from SQLite3 into Haskell. We're going to understand the basic types within SQLite3 and their Haskell counterparts. We're also going to be installing the necessary software in order to get Haskell and SQLite3 to communicate with each other, and we're going to be writing a few SELECT queries within Haskell.

There are a few different data types in SQLite3 with their Haskell counterparts:

The four primary types are INTEGER, REAL, TEXT, and BLOB; TEXT and BLOB are almost the same types. One is for raw data and the other is for string data, but we can interpret both of those in Haskell as String. INTEGER corresponds to Integer; REAL corresponds to Decimal. There is a fifth type in SQLite3 called NUMERIC, which is adaptive and is treated as an integer with INTEGER data and a real with...