July 2017
Beginner to intermediate
312 pages
7h 27m
English
Content preview from Python Social Media Analytics
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Latent Dirichlet Allocation
LDA is a generative probabilistic model of a corpus. The fundamental idea is that documents are a mixture of random latent topics, where a topic is characterized by a distribution over words.
The generative process of LDA can be illustrated as follows:
To simplify, the algorithm assumes a Poisson and Dirichlet distribution on the model and then constitutes the members of each cluster by maximizing the probability of a new word being in the cluster given the current members.
The Dirichlet equation, where a k-dimensional ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.