Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Machine Learning Techniques for Text
  • Table Of Contents Toc
  • Feedback & Rating feedback
Machine Learning Techniques for Text

Machine Learning Techniques for Text

By : Nikos Tsourakis
4.8 (6)
close
close
Machine Learning Techniques for Text

Machine Learning Techniques for Text

4.8 (6)
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)
close
close

Introducing the LDA algorithm

In Chapter 3, Classifying Topics of Newsgroup Posts, we examined how to classify the instances of a newsgroup dataset into predefined topics. A related situation is encountered when we want to assign a topic label to a piece of text without prior knowledge of the available topics. Topic modeling refers to the task of identifying groups of items, in our case words, that best describes a collection of documents or sentences. The topics emerge during the specific process; hence they are called latent.

A popular topic modeling technique to extract the hidden topics from a given corpus is the latent dirichlet allocation (LDA). Strictly speaking, LDA is not a clustering algorithm because it produces a distribution of groupings over the sentences being processed. However, as a document can be a part of multiple topics, LDA resembles a soft clustering algorithm in which each data point belongs to more than one cluster. For this reason, we made it part of this...

Visually different images
CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
Machine Learning Techniques for Text
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist download Download options font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon