Book Image

Machine Learning Techniques for Text

By : Nikos Tsourakis
Book Image

Machine Learning Techniques for Text

By: Nikos Tsourakis

Overview of this book

With the ever-increasing demand for machine learning and programming professionals, it's prime time to invest in the field. This book will help you in this endeavor, focusing specifically on text data and human language by steering a middle path among the various textbooks that present complicated theoretical concepts or focus disproportionately on Python code. A good metaphor this work builds upon is the relationship between an experienced craftsperson and their trainee. Based on the current problem, the former picks a tool from the toolbox, explains its utility, and puts it into action. This approach will help you to identify at least one practical use for each method or technique presented. The content unfolds in ten chapters, each discussing one specific case study. For this reason, the book is solution-oriented. It's accompanied by Python code in the form of Jupyter notebooks to help you obtain hands-on experience. A recurring pattern in the chapters of this book is helping you get some intuition on the data and then implement and contrast various solutions. By the end of this book, you'll be able to understand and apply various techniques with Python for text preprocessing, text representation, dimensionality reduction, machine learning, language modeling, visualization, and evaluation.
Table of Contents (13 chapters)

Summary

We covered a lot of ground in this chapter. Focusing on the sentiment analysis problem using real-world reviews from the Amazon online store, we became better acquainted with different algorithms and methods for supervised learning. Simultaneously, we broadened our coverage on how algorithms learn from data and how to incorporate optimization techniques for this task.

We worked on more advanced plots, starting with the EDA phase, and provided both cumulative and individual statistics for the reviewers. Additionally, we found an indirect way to assign a sentiment label to the data samples utilizing the reviewers’ ratings.

The discussion around logistic regression facilitated the introduction of avoiding overfitting using regularization. Then, we detailed how artificial neurons are networked together to form complex networks. Finally, both algorithms were used to classify the samples in the dataset and provided good performance. Up next, we have another problem to...