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Machine Learning for Finance

You're reading from   Machine Learning for Finance Principles and practice for financial insiders

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Product type Paperback
Published in May 2019
Publisher Packt
ISBN-13 9781789136364
Length 456 pages
Edition 1st Edition
Languages
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Authors (2):
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Jannes Klaas Jannes Klaas
Author Profile Icon Jannes Klaas
Jannes Klaas
James Le James Le
Author Profile Icon James Le
James Le
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Toc

Table of Contents (15) Chapters Close

Machine Learning for Finance
Contributors
Preface
Other Books You May Enjoy
1. Neural Networks and Gradient-Based Optimization 2. Applying Machine Learning to Structured Data FREE CHAPTER 3. Utilizing Computer Vision 4. Understanding Time Series 5. Parsing Textual Data with Natural Language Processing 6. Using Generative Models 7. Reinforcement Learning for Financial Markets 8. Privacy, Debugging, and Launching Your Products 9. Fighting Bias 10. Bayesian Inference and Probabilistic Programming Index

Named entity recognition


A common task in NLP is named entity recognition (NER). NER is all about finding things that the text explicitly refers to. Before discussing more about what is going on, let's jump right in and do some hands-on NER on the first article in our dataset.

The first thing we need to do is load spaCy, in addition to the model for English language processing:

import spacy
nlp = spacy.load('en')

Next, we must select the text of the article from our data:

text = df.loc[0,'content']

Finally, we'll run this piece of text through the English language model pipeline. This will create a Doc instance, something we explained earlier on in this chapter. The file will hold a lot of information, including the named entities:

doc = nlp(text)

One of the best features of spaCy is that it comes with a handy visualizer called displacy, which we can use to show the named entities in text. To get the visualizer to generate the display, based on the text from our article, we must run this code:

from...
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