Book Image

Deep Learning from the Basics

By : Koki Saitoh
5 (1)
Book Image

Deep Learning from the Basics

5 (1)
By: Koki Saitoh

Overview of this book

Deep learning is rapidly becoming the most preferred way of solving data problems. This is thanks, in part, to its huge variety of mathematical algorithms and their ability to find patterns that are otherwise invisible to us. Deep Learning from the Basics begins with a fast-paced introduction to deep learning with Python, its definition, characteristics, and applications. You’ll learn how to use the Python interpreter and the script files in your applications, and utilize NumPy and Matplotlib in your deep learning models. As you progress through the book, you’ll discover backpropagation—an efficient way to calculate the gradients of weight parameters—and study multilayer perceptrons and their limitations, before, finally, implementing a three-layer neural network and calculating multidimensional arrays. By the end of the book, you’ll have the knowledge to apply the relevant technologies in deep learning.
Table of Contents (11 chapters)

Designing the Output Layer

You can use a neural network both for a classification problem and for a regression problem. However, you must change the activation function of the output layer, depending on which of the problems you use a neural network for. Usually, an identity function is used for a regression problem, and a softmax function is used for a classification problem.

Note

Machine learning problems can be broadly divided into "classification problems" and "regression problems." A classification problem is a problem of identifying which class the data belongs to—for example, classifying the person in an image as a man or a woman—while a regression problem is a problem of predicting a (continuous) number from certain input data—for example, predicting the weight of the person in an image.