NonnegativeMatrixFactorizationACLSEvaluate Method

Factorizes matrix a into nonnegative factors and nonnegative base vectors.

Namespace: Altaxo.Calc.LinearAlgebra.Factorization
Assembly: AltaxoCore (in AltaxoCore.dll) Version: 4.8.3179.0 (4.8.3179.0)

Syntax

Copy

public (Matrix<double> W, Matrix<double> H) Evaluate(
	Matrix<double> a,
	int r,
	int maximalNumberOfIterations,
	double lambdaH = 0,
	double lambdaW = 0
)

Parameters

a MatrixDouble: The matrix to factorize.
r Int32: The number of components (number of base vectors).
maximalNumberOfIterations Int32: The maximal number of iterations for the calculation.
lambdaH Double (Optional): Regularization parameter for the factors.
lambdaW Double (Optional): Regularization parameter for the base vectors.

Return Value

ValueTupleMatrixDouble, MatrixDouble
Matrix of base vectors W (each base vector is a column of the matrix), and matrix of factors H.

Exceptions

Exception	Condition
ArgumentNullException	a

Remarks

Algorithm is described in [1], page 7.

Please note that base vectors and factors are output in arbitrary order.

Reference

NonnegativeMatrixFactorizationACLS Class

Altaxo.Calc.LinearAlgebra.Factorization Namespace