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18 Oct 07

LingPipe: API Tutorials

  • Sentiment Analysis



    Uses language model classifiers to do sentiment analysis over movie
    reviews. Whole movie reviews are classified by polarity (thumbs up or
    thumbs down), and single sentences are classified with respect to
    subjectivity (subjective/opinion or objective/fact). Walks through
    compiling models and reading the extensive output produced by the
    classifier evaluators. Also explains hierarchical classification
    which stacks the polarity classifier on top of the subjectivity
    classifier for improved performance. Discusses binomial confidence
    intervals and the danger of a posteriori parameter setting.

  • Chinese Word Segmentation



    Shows how to segment a stream of Chinese characters into distinct
    words. The demo uses the standard LingPipe spelling corrector with an
    edit distance tuned for word segmentation. Shows how to train and
    evaluate using publicly available training corpora from the First and
    Second International Chinese Word Segmentation Bakeoffs.

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