NMFAlsUpdate Class

Class NMFAlsUpdate encapsulates the Alternating Least Squares (ALS) update algorithm.

Inheritance Hierarchy

SystemObject
CenterSpace.NMath.CoreNMFAlsUpdate

Namespace: CenterSpace.NMath.Core
Assembly: NMath (in NMath.dll) Version: 7.4

Syntax

C++

Copy

[SerializableAttribute]
public class NMFAlsUpdate : INMFUpdateAlgorithm, 
	ICloneable

<SerializableAttribute>
Public Class NMFAlsUpdate
	Implements INMFUpdateAlgorithm, ICloneable

[SerializableAttribute]
public ref class NMFAlsUpdate : INMFUpdateAlgorithm, 
	ICloneable

[<SerializableAttribute>]
type NMFAlsUpdate = 
    class
        interface INMFUpdateAlgorithm
        interface ICloneable
    end

The NMFAlsUpdate type exposes the following members.

Constructors

	Name	Description
	NMFAlsUpdate	Constructs an NMFAlsUpdate instance.

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Methods

	Name	Description
	Clone	Creates a deep copy of this NMFAlsUpdate.
	Cost	Returns the value of the cost function for the non-negative factorization of V = WH. The cost function is minimized by the factorization.
	InitialFactors	Provides the initial factors for the iteration process that computes W and H in the non-negative matrix factorization V = WH.
	IterationStep	Updates the factors W and H in the non-negative matrix factorization V = WH.

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Remarks

The Alternating Least Squares (ALS) update algorithm takes advantage of the fact that while the optimization problem is not simultaneously convex in W and H, it is convex in either W or H. Thus, given one matrix, the other can be found with a simple least squares computation.

Reference

CenterSpace.NMath.Core Namespace