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

Experimenting with parameters that support early stopping

Overfitting models is one of the common issues often faced when trying to solve an ML problem. Overfitting is said to have occurred when the ML model tries to adapt to your training set too much, so much so that it is only able to make predictions on values that it has seen before in the training set and is unable to make a generalized prediction on unseen data.

Overfitting occurs due to a variety of reasons, one of them being that the model learns so much from the dataset that it even incorporates and learns the noise in the dataset. This learning negatively impacts predictions on new data that may not have that noise. So, how do we tackle this issue and prevent the model from overfitting? Stop the model early before it learns the noise.

In the following sub-sections, we shall understand what early stopping is and how it is done. Then, we will learn how the early stopping parameters offered by H2O AutoML work.

Understanding...