Module ojalgo

Package org.ojalgo.matrix.decomposition

Class SparseLU.PermutationEta

java.lang.Object

org.ojalgo.matrix.decomposition.SparseLU.PermutationEta

All Implemented Interfaces:

InvertibleFactor<Double>, Mutate1D, Structure1D, Structure2D

Enclosing class:

SparseLU

static final class SparseLU.PermutationEta
extends Object
implements InvertibleFactor<Double>, Mutate1D

Nested Class Summary

Nested classes/interfaces inherited from interface org.ojalgo.matrix.transformation.InvertibleFactor

InvertibleFactor.IdentityFactor<N extends Comparable<N>>

Nested classes/interfaces inherited from interface org.ojalgo.structure.Mutate1D

Mutate1D.Fillable<N extends Comparable<N>>, Mutate1D.Mixable<N extends Comparable<N>>, Mutate1D.Modifiable<N extends Comparable<N>>, Mutate1D.ModifiableReceiver<N extends Comparable<N>>, Mutate1D.Receiver<N extends Comparable<N>>, Mutate1D.Sortable

Nested classes/interfaces inherited from interface org.ojalgo.structure.Structure1D

Structure1D.BasicMapper<T>, Structure1D.IndexMapper<T>, Structure1D.IntIndex, Structure1D.Logical<S extends Structure1D,B extends Structure1D.Logical<S,B>>, Structure1D.LongIndex, Structure1D.LoopCallback

Nested classes/interfaces inherited from interface org.ojalgo.structure.Structure2D

Structure2D.IntRowColumn, Structure2D.Logical<S extends Structure2D,B extends Structure2D.Logical<S,B>>, Structure2D.LongRowColumn, Structure2D.ReducibleTo1D<R extends Structure1D>, Structure2D.Reshapable, Structure2D.RowColumnKey<R,C>, Structure2D.RowColumnMapper<R,C>

Field Summary

Fields

Modifier and Type	Field	Description
private final int	myDim
private final SparseArray<Double>	myElements
private final int	myFrom
private final int	myTo

Constructor Summary

Constructors

Constructor	Description
PermutationEta(int dim, int from, int to)

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()
int	getRowDim()
void	reset()	Reset this mutable structure to some standard (all zeros) initial state.
void	set(int j, double value)
void	set(long index, Comparable<?> value)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.ojalgo.structure.Mutate1D

set, set, set, set, set, set, set, set, set, set, set

Methods inherited from interface org.ojalgo.structure.Structure2D

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

Field Details

myDim

private final int myDim

myElements

private final SparseArray<Double> myElements

myFrom

private final int myFrom

myTo

private final int myTo

Constructor Details

PermutationEta

PermutationEta(int dim,
 int from,
 int to)

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

reset

public void reset()

Description copied from interface: Mutate1D

Reset this mutable structure to some standard (all zeros) initial state. It must still be usuable after this call, and the structure/size/shape must not change.

Specified by:

reset in interface Mutate1D

set

public void set(int j,
 double value)

Specified by:

set in interface Mutate1D

set

public void set(long index,
 Comparable<?> value)

Specified by:

set in interface Mutate1D