Book Image

Practical Automated Machine Learning Using H2O.ai

By : Salil Ajgaonkar
Book Image

Practical Automated Machine Learning Using H2O.ai

By: Salil Ajgaonkar

Overview of this book

With the huge amount of data being generated over the internet and the benefits that Machine Learning (ML) predictions bring to businesses, ML implementation has become a low-hanging fruit that everyone is striving for. The complex mathematics behind it, however, can be discouraging for a lot of users. This is where H2O comes in – it automates various repetitive steps, and this encapsulation helps developers focus on results rather than handling complexities. You’ll begin by understanding how H2O’s AutoML simplifies the implementation of ML by providing a simple, easy-to-use interface to train and use ML models. Next, you’ll see how AutoML automates the entire process of training multiple models, optimizing their hyperparameters, as well as explaining their performance. As you advance, you’ll find out how to leverage a Plain Old Java Object (POJO) and Model Object, Optimized (MOJO) to deploy your models to production. Throughout this book, you’ll take a hands-on approach to implementation using H2O that’ll enable you to set up your ML systems in no time. By the end of this H2O book, you’ll be able to train and use your ML models using H2O AutoML, right from experimentation all the way to production without a single need to understand complex statistics or data science.
Table of Contents (19 chapters)
1
Part 1 H2O AutoML Basics
4
Part 2 H2O AutoML Deep Dive
10
Part 3 H2O AutoML Advanced Implementation and Productization

Working with Model Explainability

The justification of model selection and performance is just as important as model training. You can have N trained models using different algorithms, and all of them will be able to make good enough predictions for real-world problems. So, how do you select one of them to be used in your production services, and how do you justify to your stakeholders that your chosen model is better than the others, even though all the other models were also able to make accurate predictions to some degree? One answer is performance metrics, but as we saw in the previous chapter, there are plenty of performance metrics and all of them measure different types of performance. Choosing the correct performance metric boils down to the context of your ML problem. What else can we use that will help us choose the right model and also further help us in justifying this selection?

The answer to that is visual graphs. Human beings are visual creatures and, as such, a...