Book Image

Statistics for Machine Learning

By : Pratap Dangeti
Book Image

Statistics for Machine Learning

By: Pratap Dangeti

Overview of this book

Complex statistics in machine learning worry a lot of developers. Knowing statistics helps you build strong machine learning models that are optimized for a given problem statement. This book will teach you all it takes to perform the complex statistical computations that are required for machine learning. You will gain information on the statistics behind supervised learning, unsupervised learning, reinforcement learning, and more. You will see real-world examples that discuss the statistical side of machine learning and familiarize yourself with it. You will come across programs for performing tasks such as modeling, parameter fitting, regression, classification, density collection, working with vectors, matrices, and more. By the end of the book, you will have mastered the statistics required for machine learning and will be able to apply your new skills to any sort of industry problem.
Table of Contents (16 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Artificial neural networks - ANN


Artificial neural networks (ANNs) model the relationship between a set of input signals and output signals using a model derived from a replica of the biological brain, which responds to stimuli from its sensory inputs. The human brain consists of about 90 billion neurons, with around 1 trillion connections between them; ANN methods try to model problems using interconnected artificial neurons (or nodes) to solve machine learning problems.

As we know, ANNs have taken inspiration from the biological neuron. We will spend some time understanding how biological neurons work. Incoming signals are received by the cell's dendrites through a biochemical process that allows the impulses to be weighted according to their relative importance. As the cell body begins to accumulate the incoming signals, a threshold is reached, at which the cell fires and the output signal is then transmitted via an electrochemical process down the axon. At the axon terminal, an electric...