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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
Languages
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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

Embedding feature creation into a scikit-learn pipeline

Throughout this chapter, we’ve discussed how to automatically create and select features from time-series data by utilizing tsfresh. Then, we used these features to train a classification model to predict whether an office was occupied at any given hour.

tsfresh includes wrapper classes around its main functions, extract_features and extract_relevant_features, to make the creation and selection of features compatible with the scikit-learn pipeline.

In this recipe, we will set up a scikit-learn pipeline that extracts features from time series using tsfresh and then trains a logistic regression model with those features to predict office occupancy.

How to do it...

Let’s begin by importing the necessary libraries and getting the dataset ready:

  1. Let’s import the required libraries and functions:
    import pandas as pd
    from sklearn.pipeline import Pipeline
    from sklearn.linear_model import LogisticRegression...
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