8. Evaluation
Evaluating the performance of AI models is crucial for ensuring their accuracy and reliability in real-world applications. Key evaluation techniques include various performance metrics such as accuracy, precision, recall, and F1 score, which provide insights into how well models generalize to unseen data. The chapter also emphasizes the importance of using cross-validation and tools like the confusion matrix to avoid issues like overfitting and underfitting.
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What we have learnt
- Evaluation is vital for validating the effectiveness of AI models.
- Key performance metrics include accuracy, precision, recall, and F1 score.
- Avoiding overfitting and underfitting is essential for building robust models.
Key Concepts
- -- Evaluation in AI
- The process of testing a trained AI model to check its accuracy and performance on unseen data.
- -- Performance Metrics
- Quantitative measures such as accuracy, precision, recall, and F1 score to evaluate the effectiveness of AI models.
- -- Confusion Matrix
- A table used to visualize the performance of a classification model, showing true positives, false positives, true negatives, and false negatives.
- -- Overfitting
- When a model performs well on training data but poorly on test data, often due to learning noise.
- -- Underfitting
- When a model performs poorly on both training and test data, failing to capture the underlying patterns.
- -- CrossValidation
- A method of testing a model on different subsets of data to ensure consistent performance.
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