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feat: Add Feature Engineering topic #5317

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12 changes: 12 additions & 0 deletions topics/feature-engineering/index.md
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---
aliases: feature-extraction, feature-selection, feature-transformation, feature-creation
display_name: Feature Engineering

short_description: Creating and transforming features to improve machine learning performance.
topic: feature-engineering

wikipedia_url: https://en.wikipedia.org/wiki/Feature_engineering
related: machine-learning, data-science, preprocessing, artificial-intelligence
---

Feature engineering is the process of creating, selecting, and transforming input features to improve the performance of machine learning models. It includes techniques such as feature extraction, feature selection, encoding categorical variables, scaling numerical features, and generating new features from existing data. Effective feature engineering helps models capture meaningful patterns, improve predictive accuracy, and generalize better to unseen data.