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Getting Started with Haskell Data Analysis

You're reading from   Getting Started with Haskell Data Analysis Put your data analysis techniques to work and generate publication-ready visualizations

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Product type Paperback
Published in Oct 2018
Publisher Packt
ISBN-13 9781789802863
Length 160 pages
Edition 1st Edition
Languages
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Author (1):
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James Church James Church
Author Profile Icon James Church
James Church
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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...

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