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

Understanding Data Processing

A Machine Learning (ML) model is the output we get once data is fitted into an ML algorithm. It represents the underlying relationship between various features and how that relationship impacts the target variable. This relationship depends entirely on the contents of the dataset. What makes every ML model unique, despite using the same ML algorithm, is the dataset that is used to train said model. Data can be collected from various sources and can have different schemas and structures, which need not be structurally compatible among themselves but may in fact be related to each other. This relationship can be very valuable and can also potentially be the differentiator between a good and a bad model. Thus, it is important to transform this data to meet the requirements of the ML algorithm to eventually train a good model.

Data processing, data preparation, and data preprocessing are all steps in the ML pipeline that focus on best exposing the underlying...