Lexicographic text analysis using non-negative factorisation techniques

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• Sinead Williamson
• Thursday 19 January 2006, 15:00-16:00
• Ryle Seminar Room, Cavendish Laboratory.

If you have a question about this talk, please contact Phil Cowans.

Non-negative matrix factorisation (NNMF) is proposed as an alternative to Principle Component Analysis for use in latent semantic analysis of large text corpora. NNMF recognises the inherent non-negativity of language data, and has been shown to organise data into easily understood concept groups of words. The representation of articles as a linear superposition of such concept groups provides an intuitive method for comparison between articles.

This talk is part of the Inference Group series.

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