Book Image

Interpretable Machine Learning with Python

By : Serg Masís
Book Image

Interpretable Machine Learning with Python

By: Serg Masís

Overview of this book

Do you want to gain a deeper understanding of your models and better mitigate poor prediction risks associated with machine learning interpretation? If so, then Interpretable Machine Learning with Python deserves a place on your bookshelf. We’ll be starting off with the fundamentals of interpretability, its relevance in business, and exploring its key aspects and challenges. As you progress through the chapters, you'll then focus on how white-box models work, compare them to black-box and glass-box models, and examine their trade-off. You’ll also get you up to speed with a vast array of interpretation methods, also known as Explainable AI (XAI) methods, and how to apply them to different use cases, be it for classification or regression, for tabular, time-series, image or text. In addition to the step-by-step code, this book will also help you interpret model outcomes using examples. You’ll get hands-on with tuning models and training data for interpretability by reducing complexity, mitigating bias, placing guardrails, and enhancing reliability. The methods you’ll explore here range from state-of-the-art feature selection and dataset debiasing methods to monotonic constraints and adversarial retraining. By the end of this book, you'll be able to understand ML models better and enhance them through interpretability tuning.
Table of Contents (19 chapters)
1
Section 1: Introduction to Machine Learning Interpretation
5
Section 2: Mastering Interpretation Methods
12
Section 3:Tuning for Interpretability

Understanding anchor explanations

In Chapter 6, Local Model-Agnostic Interpretation Methods, we learned that LIME trains a local surrogate model (specifically a weighted sparse linear model) on a perturbed version of your dataset in the neighborhood of your instance of interest. The result is that you approximate a local decision boundary that can help you interpret the model's prediction for it.

Like LIME, anchors are also derived from a model-agnostic perturbation-based strategy. However, they are not about the decision boundary but the decision region. Anchors are also known as scoped rules because they list some decision rules that apply to your instance and its perturbed neighborhood. This neighborhood is also known as the perturbation space. An important detail is to what extent the rules apply to it, known as precision.

Imagine the neighborhood around your instance. You would expect the points to have more similar predictions the closer you get to your instance, right...