NNDSVDGet |
Creates an NNDSVD initialization for NMF. Intentionally allows zeros in the result (algorithm for sparse matrices).
Namespace: Altaxo.Calc.LinearAlgebra.Double.Factorization
Assembly: AltaxoCore (in AltaxoCore.dll) Version: 4.8.3572.0 (4.8.3572.0)
SyntaxC#
public virtual (Matrix<double> W, Matrix<double> H) GetInitialFactors( Matrix<double> X, int rank )
Parameters
- X MatrixDouble
- The non-negative input matrix to be factorized.
- rank Int32
- The target factorization rank.
Return Value
ValueTupleMatrixDouble, MatrixDoubleA tuple (W0, H0) containing non-negative initial factors. Both factors may contain zeros; callers are expected to handle zeros as needed (e.g. by adding small offsets).
Implements
INonnegativeMatrixFactorizationInitializerGetInitialFactors(MatrixDouble, Int32)Remarks
Intentionally allows zeros in the result (algorithm for sparse matrices).
References: Boutsidis, C., Gallopoulos, E., SVD-based initialization: A head start for nonnegative matrix factorization, Pattern Recognition, Volume 41, Issue 4, April 2008, Pages 1350-1362.
See Also