TOPIC MODELING: WHY, AND HOW - Brown University · “A topic model is a type of statistical model...
Transcript of TOPIC MODELING: WHY, AND HOW - Brown University · “A topic model is a type of statistical model...
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TOPIC MODELING: WHY, WHAT, AND HOW
@BrianCroxallBrown University
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WHY?WHAT? HOW?
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WHY?WHAT?
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“A topic model is a type of statistical model for discovering theabstract ‘topics’ that occur in a collection of documents.”
Wikipedia
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“A topic model is a type of statistical model for discovering the abstract ‘topics’ that occur in a collection of documents.”
Wikipedia
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1. Every word in a text belongs to a topic.
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2. Every word in a text is generated from one of the topics thatmake up the text.
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3. Each text is made up of all the topics you could ever find.
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4.The computer does not need to know what the words mean.
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Topic Modeling ≈ LDALatent Dirichlet Allocation
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EXAMPLES
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MINING THE DISPATCHRobert Nelson
University of Richmond
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MODELING PMLATed Underwood, University of Illinois
Andrew Goldstone, Rutgers University
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QUANTIFYING KISSINGERMicki Kaufman, CUNY Graduate Center
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WHY?WHAT? HOW?
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THANKS.@briancroxall / briancroxall.net