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Python Feature Engineering Cookbook

You're reading from   Python Feature Engineering Cookbook A complete guide to crafting powerful features for your machine learning models

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Product type Paperback
Published in Aug 2024
Publisher Packt
ISBN-13 9781835883587
Length 396 pages
Edition 3rd Edition
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Author (1):
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Soledad Galli Soledad Galli
Author Profile Icon Soledad Galli
Soledad Galli
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Toc

Table of Contents (14) Chapters Close

Preface 1. Chapter 1: Imputing Missing Data FREE CHAPTER 2. Chapter 2: Encoding Categorical Variables 3. Chapter 3: Transforming Numerical Variables 4. Chapter 4: Performing Variable Discretization 5. Chapter 5: Working with Outliers 6. Chapter 6: Extracting Features from Date and Time Variables 7. Chapter 7: Performing Feature Scaling 8. Chapter 8: Creating New Features 9. Chapter 9: Extracting Features from Relational Data with Featuretools 10. Chapter 10: Creating Features from a Time Series with tsfresh 11. Chapter 11: Extracting Features from Text Variables 12. Index 13. Other Books You May Enjoy

Extracting features from date and time

In Chapter 6, Extracting Features from Date and Time Variables, we discussed how we can enrich our datasets by extracting features from the date and time parts of datetime variables, such as the year, the month, the day of the week, the hour, and much more. We can extract those features automatically utilizing featuretools.

The featuretools library supports the creation of various features from datetime variables using its datetime transform primitives. These primitives include common variables such as year, month, and day, and other features such as is it lunch time or is it weekday. In addition, we can extract features indicating if the date was a federal or bank holiday (as they call it in the UK) or features that determine the distance in time to a certain date. For a retail company, the proximity to dates such as Boxing Day, Black Fridays, or Christmas normally signals an increase in sales, and if they are forecasting demand, these will...

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