Document-term matrix: Difference between revisions

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{{Unreferenced stub|auto=yes|date=December 2009}}

A '''document-term matrix''' or '''term-document matrix''' is a mathematical [[Matrix (mathematics)|matrix]] that describes the frequency of terms that occur in a collection of documents. In a document-term matrix, rows correspond to documents in the collection and columns correspond to terms. In a term-document matrix, rows correspond to words or terms and columns correspond to documents. There are various schemes for determining the value that each entry in the matrix should take. One such scheme is [[tf-idf]]. They are useful in the field of [[natural language processing]].

==General Concept==