Class ProductFormInverse.ElementaryFactor

java.lang.Object

org.ojalgo.optimisation.linear.ProductFormInverse.ElementaryFactor

All Implemented Interfaces:

InvertibleFactor<Double>, Structure1D, Structure2D

Enclosing class:

ProductFormInverse

static final class ProductFormInverse.ElementaryFactor
extends Object
implements InvertibleFactor<Double>

Nested Class Summary

Nested classes/interfaces inherited from interface InvertibleFactor

InvertibleFactor.IdentityFactor<N>

Nested classes/interfaces inherited from interface Structure1D

Structure1D.BasicMapper<T>, Structure1D.IndexMapper<T>, Structure1D.IntIndex, Structure1D.LongIndex, Structure1D.LoopCallback

Nested classes/interfaces inherited from interface Structure2D

Structure2D.IntRowColumn, Structure2D.Logical<S,B>, Structure2D.LongRowColumn, Structure2D.ReducibleTo1D<R>, Structure2D.Reshapable, Structure2D.RowColumnKey<R,C>, Structure2D.RowColumnMapper<R,C>

Field Summary

Fields

Modifier and Type	Field	Description
private final SparseArray<Double>	myColumn
private final int	myIndex
private final double	myNegatedDiagonal

Constructor Summary

Constructors

Constructor	Description
ElementaryFactor(SparseArray<Double> column, int index, double diagonalElement)

Method Summary

Modifier and Type	Method	Description
void	btran(double[] arg)
void	btran(PhysicalStore<Double> arg)	Backwards-transformation
void	ftran(double[] arg)
void	ftran(PhysicalStore<Double> arg)	Forward-transformation
int	getColDim()
(package private) SparseArray<Double>	getColumn()
int	getRowDim()

Methods inherited from class Object

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

Methods inherited from interface Structure2D

count, countColumns, countRows, firstInColumn, firstInRow, getMaxDim, getMinDim, isEmpty, isFat, isScalar, isSquare, isTall, isVector, limitOfColumn, limitOfRow, size

Field Details

myColumn

private final SparseArray<Double> myColumn

myIndex

private final int myIndex

myNegatedDiagonal

private final double myNegatedDiagonal

Constructor Details

ElementaryFactor

ElementaryFactor(SparseArray<Double> column,
 int index,
 double diagonalElement)

Method Details

btran

public void btran(double[] arg)

Specified by:

btran in interface InvertibleFactor<Double>

See Also:

• InvertibleFactor.IdentityFactor.btran(PhysicalStore)

btran

public void btran(PhysicalStore<Double> arg)

Description copied from interface: InvertibleFactor

Backwards-transformation

Solve [x]^T[A] = [b]^T (equivalent to [A]^T[x] = [b]) by transforming [b] into [x] in-place.

Specified by:

btran in interface InvertibleFactor<Double>

Parameters:

arg - [b] transformed into [x]

ftran

public void ftran(double[] arg)

Specified by:

ftran in interface InvertibleFactor<Double>

See Also:

• InvertibleFactor.IdentityFactor.ftran(PhysicalStore)

ftran

public void ftran(PhysicalStore<Double> arg)

Description copied from interface: InvertibleFactor

Forward-transformation

Solve [A][x] = [b] by transforming [b] into [x] in-place.

Specified by:

ftran in interface InvertibleFactor<Double>

Parameters:

arg - [b] transformed into [x]

getColDim

public int getColDim()

Specified by:

getColDim in interface Structure2D

Returns:

The number of columns

getRowDim

public int getRowDim()

Specified by:

getRowDim in interface Structure2D

Returns:

The number of rows

getColumn

SparseArray<Double> getColumn()