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Isotonic Conditional Random Fields and Local Sentiment Flow

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3 Author(s)

We examine the problem of predicting local sentiment flow in documents, and its application to several areas of text analysis. Formally, the problem is stated as predicting an ordinal sequence based on a sequence of word sets. In the spirit of isotonic regression, we develop a variant of conditional random fields that is wellsuited to handle this problem. Using the Möbius transform, we express the model as a simple convex optimization problem. Experiments demonstrate themodel and its applications to sentiment prediction, style analysis, and text summarization.