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

Class TridiagonalDecompositionHouseholderOrig_FDRM

  • public class TridiagonalDecompositionHouseholderOrig_FDRM
extends java.lang.Object

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

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

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void decompose​(org.ejml.data.FMatrixRMaj A)
      Decomposes the provided symmetric matrix.
      float getGamma​(int index)  
      org.ejml.data.FMatrixRMaj getQ​(org.ejml.data.FMatrixRMaj Q)
      An orthogonal matrix that has the following property: T = QTAQ
      org.ejml.data.FMatrixRMaj getQT()
      Returns the interal matrix where the decomposed results are stored.
      org.ejml.data.FMatrixRMaj getT​(org.ejml.data.FMatrixRMaj T)
      Extracts the tridiagonal matrix found in the decomposition.
      void householderSymmetric​(int row, float gamma)
      Performs the householder operations on left and right and side of the matrix.
      void init​(org.ejml.data.FMatrixRMaj A)
      If needed declares and sets up internal data structures.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • TridiagonalDecompositionHouseholderOrig_FDRM

        public TridiagonalDecompositionHouseholderOrig_FDRM()

    • Method Detail

      • getQT

        public org.ejml.data.FMatrixRMaj getQT()
        Returns the interal matrix where the decomposed results are stored.
        Returns:

      • getT

        public org.ejml.data.FMatrixRMaj getT​(org.ejml.data.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 org.ejml.data.FMatrixRMaj getQ​(org.ejml.data.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​(org.ejml.data.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​(org.ejml.data.FMatrixRMaj A)
        If needed declares and sets up internal data structures.
        Parameters:
        A - Matrix being decomposed.

      • getGamma

        public float getGamma​(int index)