EAN: 9781491953242

Bilder-Quelle: shopping24.de – Sport

Feature engineering is a crucial step in the machine-learning pipeline yet this topic is rarely examined on its own. With this practical book you'll learn techniques for extracting and transforming features—the numeric representations of raw data—into formats for machine-learning models. Each chapter guides you through a single data problem such as how to represent text or image data. Together these examples illustrate the main principles of feature engineering. Rather than simply teach these principles authors Alice Zheng and Amanda Casari focus on practical application with exercises throughout the book. The closing chapter brings everything together by tackling a real-world structured dataset with several feature-engineering techniques. Python packages including numpy Pandas Scikit-learn and Matplotlib are used in code examples. You'll examine: Feature engineering for numeric data: filtering binning scaling log transforms and power transforms Natural text techniques: bag-of-words n-grams and phrase detection Frequency-based filtering and feature scaling for eliminating uninformative features Encoding techniques of categorical variables including feature hashing and bin-counting Model-based feature engineering with principal component analysis The concept of model stacking using k-means as a featurization technique Image feature extraction with manual and deep-learning techniques

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31.03.2025 um 13:29 Uhr

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