Book Image

Hands-On Natural Language Processing with PyTorch 1.x

By : Thomas Dop
Book Image

Hands-On Natural Language Processing with PyTorch 1.x

By: Thomas Dop

Overview of this book

In the internet age, where an increasing volume of text data is generated daily from social media and other platforms, being able to make sense of that data is a crucial skill. With this book, you’ll learn how to extract valuable insights from text by building deep learning models for natural language processing (NLP) tasks. Starting by understanding how to install PyTorch and using CUDA to accelerate the processing speed, you’ll explore how the NLP architecture works with the help of practical examples. This PyTorch NLP book will guide you through core concepts such as word embeddings, CBOW, and tokenization in PyTorch. You’ll then learn techniques for processing textual data and see how deep learning can be used for NLP tasks. The book demonstrates how to implement deep learning and neural network architectures to build models that will allow you to classify and translate text and perform sentiment analysis. Finally, you’ll learn how to build advanced NLP models, such as conversational chatbots. By the end of this book, you’ll not only have understood the different NLP problems that can be solved using deep learning with PyTorch, but also be able to build models to solve them.
Table of Contents (14 chapters)
1
Section 1: Essentials of PyTorch 1.x for NLP
7
Section 3: Real-World NLP Applications Using PyTorch 1.x

Embeddings for NLP

Words do not have a natural way of representing their meaning. In images, we already have representations in rich vectors (containing the values of each pixel within the image), so it would clearly be beneficial to have a similarly rich vector representation of words. When parts of language are represented in a high-dimensional vector format, they are known as embeddings. Through analysis of a corpus of words, and by determining which words appear frequently together, we can obtain an n-length vector for each word, which better represents the semantic relationship of each word to all other words. We saw previously that we can easily represent words as one-hot encoded vectors:

Figure 3.1 – One-hot encoded vectors

On the other hand, embeddings are vectors of length n (in the following example, n = 3) that can take any value:

Figure 3.2 – Vectors with n=3

These embeddings represent the word's vector...