Package org.ejml.dense.row.decomposition.hessenberg

Class TridiagonalDecompositionHouseholderOrig_FDRM

java.lang.Object
org.ejml.dense.row.decomposition.hessenberg.TridiagonalDecompositionHouseholderOrig_FDRM
@Generated("org.ejml.dense.row.decomposition.hessenberg.TridiagonalDecompositionHouseholderOrig_DDRM") public class TridiagonalDecompositionHouseholderOrig_FDRM extends Object

A straight forward implementation from "Fundamentals of Matrix Computations," Second Edition.

This is only saved to provide a point of reference in benchmarks.

  • Constructor Details

    • TridiagonalDecompositionHouseholderOrig_FDRM

      public TridiagonalDecompositionHouseholderOrig_FDRM()

  • Method Details

    • getQT

      public FMatrixRMaj getQT()
      Returns the interal matrix where the decomposed results are stored.

    • getT

      public FMatrixRMaj getT(@Nullable @Nullable FMatrixRMaj T)
      Extracts the tridiagonal matrix found in the decomposition.
      Parameters:
      T - If not null then the results will be stored here. Otherwise a new matrix will be created.
      Returns:
      The extracted T matrix.

    • getQ

      public FMatrixRMaj getQ(@Nullable @Nullable FMatrixRMaj Q)
      An orthogonal matrix that has the following property: T = QTAQ
      Parameters:
      Q - If not null then the results will be stored here. Otherwise a new matrix will be created.
      Returns:
      The extracted Q matrix.

    • decompose

      public void decompose(FMatrixRMaj A)
      Decomposes the provided symmetric matrix.
      Parameters:
      A - Symmetric matrix that is going to be decomposed. Not modified.

    • householderSymmetric

      public void householderSymmetric(int row, float gamma)
      Performs the householder operations on left and right and side of the matrix. QTAQ
      Parameters:
      row - Specifies the submatrix.
      gamma - The gamma for the householder operation

    • init

      public void init(FMatrixRMaj A)
      If needed declares and sets up internal data structures.
      Parameters:
      A - Matrix being decomposed.

    • getGamma

      public float getGamma(int index)