| 摘要 |
A document similarity calculation device, configured to calculate a similarity indicating a degree of how much a plurality of documents are similar, includes: an associative word group storage portion for storing an associative word group composed of words associated with one another, a word-in-document frequency matrix generation portion for generating a matrix of word frequency in document which is a matrix each element of which is the frequency of a word present in a document with respect to each combination of the word and the document, a word-in-document frequency matrix transformation portion for transforming the generated matrix of word frequency in document based on the stored associative word group so as to reduce the number of dimensions of the matrix of word frequency in document, and a similarity calculation portion for calculating the similarity based on the transformed matrix of word frequency in document.
|
