Book Image

Machine Learning for Finance

By : Jannes Klaas
Book Image

Machine Learning for Finance

By: Jannes Klaas

Overview of this book

Machine Learning for Finance explores new advances in machine learning and shows how they can be applied across the financial sector, including insurance, transactions, and lending. This book explains the concepts and algorithms behind the main machine learning techniques and provides example Python code for implementing the models yourself. The book is based on Jannes Klaas’ experience of running machine learning training courses for financial professionals. Rather than providing ready-made financial algorithms, the book focuses on advanced machine learning concepts and ideas that can be applied in a wide variety of ways. The book systematically explains how machine learning works on structured data, text, images, and time series. You'll cover generative adversarial learning, reinforcement learning, debugging, and launching machine learning products. Later chapters will discuss how to fight bias in machine learning. The book ends with an exploration of Bayesian inference and probabilistic programming.
Table of Contents (15 chapters)
Machine Learning for Finance
Contributors
Preface
Other Books You May Enjoy
Index

Regular expressions


Regular expressions, or regexes, are a powerful form of rule-based matching. Invented back in the 1950s, they were, for a very long time, the most useful way to find things in text and proponents argue that they still are.

No chapter on NLP would be complete without mentioning regexes. With that being said, this section is by no means a complete regex tutorial. It's intended to introduce the general idea and show how regexes can be used in Python, pandas, and spaCy.

A very simple regex pattern could be "a." This would only find instances of the lower-case letter a followed by a dot. However, regexes also allow you to add ranges of patterns; for example, "[a-z]." would find any lower-case letter followed by a dot, and "xy." would find only the letters "x" or "y" followed by a dot.

Regex patterns are case sensitive, so "A-Z" would only capture upper-case letters. This is useful if we are searching for expressions in which the spelling is frequently different; for example,...