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407Why Feature Scaling Matters
408Min-Max Normalization
409Standardization (Z-score Normalization)
410When to Use Normalization vs Standardization
411Robust Scaling for Outliers
412MaxAbs Scaling for Sparse Data
413Fitting Scalers on Training Data Only
414Feature Scaling in Pipelines
415Scaling Specific Feature Types
416When Not to Scale Features
417Why Categorical Variables Need Encoding
418Ordinal vs Nominal Categories
419Label Encoding for Ordinal Variables
420One-Hot Encoding Fundamentals
421Handling High-Cardinality Categories
422Target Encoding and Mean Encoding
423Preventing Target Leakage in Target Encoding
424Frequency and Count Encoding
425Binary Encoding for Memory Efficiency
426Handling Unseen Categories at Test Time
427Embedding Layers for Categorical Variables
428Choosing the Right Encoding Strategy
429Types of Missing Data: MCAR, MAR, and MNAR
430Identifying Missing Data Patterns
431Deletion Strategies: Listwise and Pairwise
432Simple Imputation: Mean, Median, and Mode
433Forward Fill and Backward Fill for Time Series
434K-Nearest Neighbors Imputation
435Iterative Imputation and MICE
436Detecting Outliers: Statistical Methods
437Multivariate Outlier Detection
438Handling Outliers: Removal, Capping, and Transformation
439Feature Creation: Domain-Driven Feature Engineering
440Polynomial and Interaction Features
441Binning and Discretization Techniques
442Time-Based Feature Engineering
443Aggregation and Window Features
444Feature Selection: Filter Methods
445Wrapper Methods: Forward and Backward Selection
446Embedded Methods: L1 Regularization for Feature Selection
447Tree-Based Feature Importance
448Recursive Feature Elimination
449Feature Selection for High-Dimensional Data
450Evaluating Feature Engineering Pipelines

407Why Feature Scaling Matters
408Min-Max Normalization
409Standardization (Z-score Normalization)
410When to Use Normalization vs Standardization
411Robust Scaling for Outliers
412MaxAbs Scaling for Sparse Data
413Fitting Scalers on Training Data Only
414Feature Scaling in Pipelines
415Scaling Specific Feature Types
416When Not to Scale Features
417Why Categorical Variables Need Encoding
418Ordinal vs Nominal Categories
419Label Encoding for Ordinal Variables
420One-Hot Encoding Fundamentals
421Handling High-Cardinality Categories
422Target Encoding and Mean Encoding
423Preventing Target Leakage in Target Encoding
424Frequency and Count Encoding
425Binary Encoding for Memory Efficiency
426Handling Unseen Categories at Test Time
427Embedding Layers for Categorical Variables
428Choosing the Right Encoding Strategy
429Types of Missing Data: MCAR, MAR, and MNAR
430Identifying Missing Data Patterns
431Deletion Strategies: Listwise and Pairwise
432Simple Imputation: Mean, Median, and Mode
433Forward Fill and Backward Fill for Time Series
434K-Nearest Neighbors Imputation
435Iterative Imputation and MICE
436Detecting Outliers: Statistical Methods
437Multivariate Outlier Detection
438Handling Outliers: Removal, Capping, and Transformation
439Feature Creation: Domain-Driven Feature Engineering
440Polynomial and Interaction Features
441Binning and Discretization Techniques
442Time-Based Feature Engineering
443Aggregation and Window Features
444Feature Selection: Filter Methods
445Wrapper Methods: Forward and Backward Selection
446Embedded Methods: L1 Regularization for Feature Selection
447Tree-Based Feature Importance
448Recursive Feature Elimination
449Feature Selection for High-Dimensional Data
450Evaluating Feature Engineering Pipelines

Lesson 437 of 3,538·10. Feature EngineeringPro lesson

Multivariate Outlier Detection

Applying isolation forests, local outlier factor, and Mahalanobis distance to detect outliers in high-dimensional space.

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