Package org.ejml.dense.row.decomposition.lu

Class LUDecompositionBase_FDRM

java.lang.Object
org.ejml.dense.row.decomposition.lu.LUDecompositionBase_FDRM
All Implemented Interfaces:
org.ejml.interfaces.decomposition.DecompositionInterface<org.ejml.data.FMatrixRMaj>, org.ejml.interfaces.decomposition.LUDecomposition<org.ejml.data.FMatrixRMaj>, org.ejml.interfaces.decomposition.LUDecomposition_F32<org.ejml.data.FMatrixRMaj>
Direct Known Subclasses:
LUDecompositionAlt_FDRM
@Generated("org.ejml.dense.row.decomposition.lu.LUDecompositionBase_DDRM") public abstract class LUDecompositionBase_FDRM extends Object implements org.ejml.interfaces.decomposition.LUDecomposition_F32<org.ejml.data.FMatrixRMaj>

Contains common data structures and operations for LU decomposition algorithms.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected float[]
    dataLU
     
    protected int[]
    indx
     
    protected org.ejml.data.FMatrixRMaj
    LU
     
    protected int
    m
     
    protected int
    maxWidth
     
    protected int
    n
     
    protected int[]
    pivot
     
    protected float
    pivsign
     
    protected float[]
    vv
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    LUDecompositionBase_FDRM()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    float[]
    _getVV()
     
    void
    _solveVectorInternal(float[] vv)
    a specialized version of solve that avoid additional checks that are not needed.
    org.ejml.data.Complex_F32
    computeDeterminant()
    Computes the determinant from the LU decomposition.
    protected void
    decomposeCommonInit(org.ejml.data.FMatrixRMaj a)
     
    int[]
    getIndx()
     
    org.ejml.data.FMatrixRMaj
    getLower(@Nullable org.ejml.data.FMatrixRMaj lower)
    Writes the lower triangular matrix into the specified matrix.
    org.ejml.data.FMatrixRMaj
    getLU()
     
    int[]
    getPivot()
     
    org.ejml.data.FMatrixRMaj
    getRowPivot(@Nullable org.ejml.data.FMatrixRMaj pivot)
     
    int[]
    getRowPivotV(@Nullable org.ejml.data.IGrowArray pivot)
     
    org.ejml.data.FMatrixRMaj
    getUpper(@Nullable org.ejml.data.FMatrixRMaj upper)
    Writes the upper triangular matrix into the specified matrix.
    boolean
    inputModified()
     
    boolean
    isSingular()
    Determines if the decomposed matrix is singular.
    double
    quality()
     
    void
    setExpectedMaxSize(int numRows, int numCols)
     

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface org.ejml.interfaces.decomposition.DecompositionInterface

    decompose

  • Field Details

    • LU

      protected org.ejml.data.FMatrixRMaj LU

    • maxWidth

      protected int maxWidth

    • m

      protected int m

    • n

      protected int n

    • dataLU

      protected float[] dataLU

    • vv

      protected float[] vv

    • indx

      protected int[] indx

    • pivot

      protected int[] pivot

    • pivsign

      protected float pivsign

  • Constructor Details

    • LUDecompositionBase_FDRM

      public LUDecompositionBase_FDRM()

  • Method Details

    • setExpectedMaxSize

      public void setExpectedMaxSize(int numRows, int numCols)

    • getLU

      public org.ejml.data.FMatrixRMaj getLU()

    • getIndx

      public int[] getIndx()

    • getPivot

      public int[] getPivot()

    • inputModified

      public boolean inputModified()
      Specified by:
      inputModified in interface org.ejml.interfaces.decomposition.DecompositionInterface<org.ejml.data.FMatrixRMaj>

    • getLower

      public org.ejml.data.FMatrixRMaj getLower(@Nullable @Nullable org.ejml.data.FMatrixRMaj lower)
      Writes the lower triangular matrix into the specified matrix.
      Specified by:
      getLower in interface org.ejml.interfaces.decomposition.LUDecomposition<org.ejml.data.FMatrixRMaj>
      Parameters:
      lower - Where the lower triangular matrix is written to.

    • getUpper

      public org.ejml.data.FMatrixRMaj getUpper(@Nullable @Nullable org.ejml.data.FMatrixRMaj upper)
      Writes the upper triangular matrix into the specified matrix.
      Specified by:
      getUpper in interface org.ejml.interfaces.decomposition.LUDecomposition<org.ejml.data.FMatrixRMaj>
      Parameters:
      upper - Where the upper triangular matrix is writen to.

    • getRowPivot

      public org.ejml.data.FMatrixRMaj getRowPivot(@Nullable @Nullable org.ejml.data.FMatrixRMaj pivot)
      Specified by:
      getRowPivot in interface org.ejml.interfaces.decomposition.LUDecomposition<org.ejml.data.FMatrixRMaj>

    • getRowPivotV

      public int[] getRowPivotV(@Nullable @Nullable org.ejml.data.IGrowArray pivot)
      Specified by:
      getRowPivotV in interface org.ejml.interfaces.decomposition.LUDecomposition<org.ejml.data.FMatrixRMaj>

    • decomposeCommonInit

      protected void decomposeCommonInit(org.ejml.data.FMatrixRMaj a)

    • isSingular

      public boolean isSingular()
      Determines if the decomposed matrix is singular. This function can return false and the matrix be almost singular, which is still bad.
      Specified by:
      isSingular in interface org.ejml.interfaces.decomposition.LUDecomposition<org.ejml.data.FMatrixRMaj>
      Returns:
      true if singular false otherwise.

    • computeDeterminant

      public org.ejml.data.Complex_F32 computeDeterminant()
      Computes the determinant from the LU decomposition.
      Specified by:
      computeDeterminant in interface org.ejml.interfaces.decomposition.LUDecomposition_F32<org.ejml.data.FMatrixRMaj>
      Returns:
      The matrix's determinant.

    • quality

      public double quality()

    • _solveVectorInternal

      public void _solveVectorInternal(float[] vv)
      a specialized version of solve that avoid additional checks that are not needed.

    • _getVV

      public float[] _getVV()