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

Summary

In this chapter, we started by understanding what the drawbacks of POJOs are. Then, we learned that H2O created a counterpart to POJOs called MOJOs, which do not have the same issues that POJOs have. Then, we learned what MOJOs are and the benefits of using them over POJOs. We learned that MOJOs are smaller and faster than POJOs. In H2O’s internal experimentation, it was found that MOJOs performed better when working with large ML models.

After that, we learned how to practically extract ML models trained using AutoML as MOJOs. We understood how MOJOs can be downloaded in Python, R, and H2O Flow. Another benefit that we came across with MOJOs was that there is a special function called PrintMojo that can be used to create graphical pictures of ML models that can be read by humans. This also makes understanding the contents of the ML model easy.

Building on top of this knowledge, we implemented an experiment where we used the h2o-genmodel.jar file, along with the...