Package org.ejml.dense.block.linsol.qr

Class QrHouseHolderSolver_MT_DDRB

java.lang.Object
org.ejml.dense.block.linsol.qr.QrHouseHolderSolver_MT_DDRB
All Implemented Interfaces:
org.ejml.interfaces.linsol.LinearSolver<org.ejml.data.DMatrixRBlock,​org.ejml.data.DMatrixRBlock>, org.ejml.interfaces.linsol.LinearSolverDense<org.ejml.data.DMatrixRBlock>
@Generated("org.ejml.dense.block.linsol.qr.QrHouseHolderSolver_DDRB")
public class QrHouseHolderSolver_MT_DDRB
extends java.lang.Object
implements org.ejml.interfaces.linsol.LinearSolverDense<org.ejml.data.DMatrixRBlock>

A solver for QRDecompositionHouseholder_MT_DDRB. Systems are solved for using the standard QR decomposition method, sketched below.

A = Q*R
A*x = b
Q*R*x = b
R*x = y = QTb
x = R-1y

Where A is the m by n matrix being decomposed. Q is an orthogonal matrix. R is upper triangular matrix.

  • Field Summary

    Fields 
    Modifier and Type Field Description
    protected QRDecompositionHouseholder_MT_DDRB decomposer  
    protected org.ejml.data.DMatrixRBlock QR  

  • Constructor Summary

    Constructors 
    Constructor Description
    QrHouseHolderSolver_MT_DDRB()  

  • Method Summary

    Modifier and Type Method Description
    org.ejml.interfaces.decomposition.QRDecomposition<org.ejml.data.DMatrixRBlock> getDecomposition()  
    void invert​(org.ejml.data.DMatrixRBlock A_inv)
    Invert by solving for against an identity matrix.
    boolean modifiesA()  
    boolean modifiesB()  
    double quality()
    Computes the quality using diagonal elements the triangular R matrix in the QR decomposition.
    boolean setA​(org.ejml.data.DMatrixRBlock A)
    Computes the QR decomposition of A and store the results in A.
    void solve​(org.ejml.data.DMatrixRBlock B, org.ejml.data.DMatrixRBlock X)  

    Methods inherited from class java.lang.Object

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

  • Field Details

  • Constructor Details

  • Method Details

    • setA

      public boolean setA​(org.ejml.data.DMatrixRBlock A)
      Computes the QR decomposition of A and store the results in A.
      Specified by:
      setA in interface org.ejml.interfaces.linsol.LinearSolver<org.ejml.data.DMatrixRBlock,​org.ejml.data.DMatrixRBlock>
      Parameters:
      A - The A matrix in the linear equation. Modified. Reference saved.
      Returns:
      true if the decomposition was successful.

    • quality

      public double quality()
      Computes the quality using diagonal elements the triangular R matrix in the QR decomposition.
      Specified by:
      quality in interface org.ejml.interfaces.linsol.LinearSolver<org.ejml.data.DMatrixRBlock,​org.ejml.data.DMatrixRBlock>
      Returns:
      Solutions quality.

    • solve

      public void solve​(org.ejml.data.DMatrixRBlock B, org.ejml.data.DMatrixRBlock X)
      Specified by:
      solve in interface org.ejml.interfaces.linsol.LinearSolver<org.ejml.data.DMatrixRBlock,​org.ejml.data.DMatrixRBlock>

    • invert

      public void invert​(org.ejml.data.DMatrixRBlock A_inv)
      Invert by solving for against an identity matrix.
      Specified by:
      invert in interface org.ejml.interfaces.linsol.LinearSolverDense<org.ejml.data.DMatrixRBlock>
      Parameters:
      A_inv - Where the inverted matrix saved. Modified.

    • modifiesA

      public boolean modifiesA()
      Specified by:
      modifiesA in interface org.ejml.interfaces.linsol.LinearSolver<org.ejml.data.DMatrixRBlock,​org.ejml.data.DMatrixRBlock>

    • modifiesB

      public boolean modifiesB()
      Specified by:
      modifiesB in interface org.ejml.interfaces.linsol.LinearSolver<org.ejml.data.DMatrixRBlock,​org.ejml.data.DMatrixRBlock>

    • getDecomposition

      public org.ejml.interfaces.decomposition.QRDecomposition<org.ejml.data.DMatrixRBlock> getDecomposition()
      Specified by:
      getDecomposition in interface org.ejml.interfaces.linsol.LinearSolver<org.ejml.data.DMatrixRBlock,​org.ejml.data.DMatrixRBlock>