July 2017
Beginner to intermediate
312 pages
7h 27m
English
Content preview from Python Social Media Analytics
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Introduction to topic models
As per Wikipedia, a topic model is defined as follows :
"In machine learning and natural language processing, a topic model is a type of statistical model for discovering the abstract "topics" that occur in a collection of documents. Topic modeling is a frequently used text-mining tool for discovery of hidden semantic structures in a text body."
Topic models are essentially iterative algorithms that work with document feature matrices, to use overlapping features to group documents together. Features could simply be all the words in a sentence, or selected features such as nouns or named entities, and so on. To explain in a simplistic manner, we imagine that we have a corpus of documents of mixed subjects and ...
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