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Python Feature Engineering Cookbook

You're reading from   Python Feature Engineering Cookbook Over 70 recipes for creating, engineering, and transforming features to build machine learning models

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Product type Paperback
Published in Jan 2020
Publisher Packt
ISBN-13 9781789806311
Length 372 pages
Edition 1st 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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Table of Contents (13) Chapters Close

Preface 1. Foreseeing Variable Problems When Building ML Models 2. Imputing Missing Data FREE CHAPTER 3. Encoding Categorical Variables 4. Transforming Numerical Variables 5. Performing Variable Discretization 6. Working with Outliers 7. Deriving Features from Dates and Time Variables 8. Performing Feature Scaling 9. Applying Mathematical Computations to Features 10. Creating Features with Transactional and Time Series Data 11. Extracting Features from Text Variables 12. Other Books You May Enjoy

Implementing maximum absolute scaling

Maximum absolute scaling scales the data to its maximum value; that is, it divides every observation by the maximum value of the variable:

The result of the preceding transformation is a distribution in which the values vary approximately within the range of -1 to 1. In this recipe, we will implement maximum absolute scaling with scikit-learn.

Scikit-learn recommends using this transformer on data that is centered at zero or on sparse data.

How to do it...

Let's begin by importing the required packages, loading the dataset, and preparing the train and test sets:

  1. Import pandas and the required scikit-learn classes and function:
import pandas as pd
from sklearn.datasets import load_boston...
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