Non-negative matrix factorization: Difference between revisions

Revision as of 15:54, 3 February 2006

Revision as of 10:54, 10 February 2006

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: <math>\mathbf{WH} \leftarrow \operatorname{nmf}(\mathbf{X})</math>

Usually all three matrices must be [[non-negative matrix|non-negative]], i.e., all elements must be aboveequal to or equalgreater tothan zero.

It might be said to be a non-negative version of [[singular value decomposition]].

It was used by a FinishFinnish group of researchers in the middle of the 1990s under the name ''positive matrix factorization''.

It became more widely known after Lee and Seung's investigations of the properties of the algorithm, and after they published a simple usefulluseful algorithm.

== Uniqueness ==