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NMFDivergenceUpdate Class

Class NMFDivergenceUpdate encapulates an NMF update algorithm which minimizes a divergence functional.
Inheritance Hierarchy

Namespace: CenterSpace.NMath.Core
Assembly: NMath (in NMath.dll) Version: 7.4
public class NMFDivergenceUpdate : INMFUpdateAlgorithm, 

The NMFDivergenceUpdate type exposes the following members.

Public methodNMFDivergenceUpdate Constructs a NMFDivergenceUpdate instance.
Public methodClone Returns a deep copy of self.
Public methodCost Returns the value of the cost function for the non-negative factorization of V = WH. The cost function is minimized by the factorization.
Public methodInitialFactors Provides the initial factors for the iteration process that computes W and H in the non-negative matrix factorization V = WH.
Public methodIterationStep Updates the factors W and H in the non-negative matrix factorization V = WH.
The functional is related to the Poisson likelihood of generating V from W and H:
            D = sum(i,j)Vij*log(Vij/(WH)ij) - Vij + (WH)ij
See the paper Metagenes and Molecular Pattern Discovery Using Matrix Factorization Jean-Philippe Brunet, Pablo Tamayo, Todd R. Golub, and Jill P. Mesirov.
See Also