How do I handle missing values during feature engineering for a machine learning model?

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How do I handle missing values during feature engineering for a machine learning model?

Asked on Jan 13, 2026

Answer

Handling missing values is a crucial step in feature engineering for machine learning models, as it can significantly impact model performance. There are several strategies to address missing data, each with its own use cases.

Example Concept: Common methods for handling missing values include removing rows with missing data, imputing missing values using statistical measures (mean, median, mode), or using algorithms that support missing values natively. The choice of method depends on the dataset size, the importance of the missing data, and the model being used.

Additional Comment:

Removing rows with missing values is simple but can lead to data loss if many entries are missing.
Imputation fills in missing values with statistical measures or predictions, preserving dataset size.
Some machine learning models, like decision trees, can handle missing values internally without imputation.
It's important to consider the nature of the missing data (random or systematic) when choosing a method.
Cross-validation can help assess the impact of different imputation strategies on model performance.

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How do I handle missing values during feature engineering for a machine learning model?

Asked on Jan 13, 2026

Answer

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