Introduction to Information Retrieval
Introduction to Information Retrieval
Introduction to Information Retrieval
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<strong>Introduction</strong> <strong>to</strong> <strong>Information</strong> <strong>Retrieval</strong>Sec.14.3Similarity Metrics• Nearest neighbor method depends on a similarity (ordistance) metric.• Simplest for continuous m-dimensional instancespace is Euclidean distance.• For text, cosine similarity of tf.idf weighted vec<strong>to</strong>rs istypically most effective.8
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