Book Image

Getting Started with Haskell Data Analysis

By : James Church
Book Image

Getting Started with Haskell Data Analysis

By: James Church

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.
Table of Contents (8 chapters)

Regular Expressions

In this chapter, we are going to learn and understand what regular expressions are. The purpose of regular expressions is to represent a pattern that can be identified within some text data. In the context of data analysis, there are a couple of important uses for regular expressions:

  • To validate fields to make sure that all values within a particular column adhere to a particular format
  • To search fields based on a particular pattern

Word processors and editing applications have a Find and Replace feature. You submit a bit of text to identify within a larger bit of text, and the desired replacement. The application will replace all of the found text with the desired text. Many of these applications now include regular expression support. Rather than submitting an exact sequence of characters that need to be found, we submit a pattern. This pattern defines...