Class DenseTableau

java.lang.Object

org.ojalgo.optimisation.linear.SimplexStore

org.ojalgo.optimisation.linear.SimplexTableau

org.ojalgo.optimisation.linear.DenseTableau

All Implemented Interfaces:

Access1D<Double>, Access2D<Double>, Mutate1D, Mutate2D, Structure1D, Structure2D

final class DenseTableau
extends SimplexTableau

Nested Class Summary

Nested classes/interfaces inherited from class SimplexStore

SimplexStore.ColumnState

Nested classes/interfaces inherited from interface Access2D

Access2D.Aggregatable<N>, Access2D.Collectable<N,R>, Access2D.ColumnView<N>, Access2D.ElementView<N>, Access2D.RowView<N>, Access2D.SelectionView<N>, Access2D.Sliceable<N>, Access2D.Visitable<N>

Nested classes/interfaces inherited from interface Mutate1D

Mutate1D.Sortable

Nested classes/interfaces inherited from interface Mutate2D

Mutate2D.Exchangeable, Mutate2D.Fillable<N>, Mutate2D.Mixable<N>, Mutate2D.Modifiable<N>, Mutate2D.ModifiableReceiver<N>, Mutate2D.Receiver<N>

Nested classes/interfaces inherited from interface Structure1D

Structure1D.BasicMapper<T>, Structure1D.IndexMapper<T>, Structure1D.IntIndex, Structure1D.Logical<S,B>, 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 int	myColDim
private double[]	myPhase1Row
private final double[][]	myTableau

Fields inherited from class SimplexTableau

PRECISION

Fields inherited from class SimplexStore

edgeWeights, excluded, included, m, n, structure

Constructor Summary

Constructors

Constructor	Description
DenseTableau(int mm, int nn)
DenseTableau(LinearStructure linearStructure)

Method Summary

Modifier and Type	Method	Description
(package private) void	copyBasicSolution(double[] solution)
protected void	doPivot(int row, int col)	Perform the pivot operation on the tableau – only.
private void	doPivot(int row, int col, double[] pivotRow)
double	doubleValue(int row, int col)	Extracts one element of this matrix as a double.
(package private) double	extractValue()
(package private) boolean	fixVariable(int index, double value)
int	getColDim()
(package private) double	getInfeasibility()
(package private) double	getReducedCost(int je)
int	getRowDim()
(package private) double	getValue()
(package private) Primitive2D	newConstraintsBody()
(package private) Primitive1D	newConstraintsRHS()
(package private) Primitive1D	newObjective()
(package private) Primitive1D	phase1()	The phase-1 objective function.
(package private) void	removePhase1()
private void	scale(double[] body, int col)
void	set(int row, int col, double value)
protected void	shiftColumn(int col, double shift)

Methods inherited from class SimplexTableau

calculateDualDirection, calculateIteration, calculatePrimalDirection, constraintsBody, constraintsRHS, findNextPivotColumn, generateCutCandidates, get, getCost, getCurrentElement, getCurrentElement, getCurrentRHS, getInfeasibility, newSimplexTableauSolver, newTableauFactory, objective, pivot, pivot, prepareToIterate, resetBasis, set, setupClassicPhase1Objective, sliceBodyColumn, sliceBodyRow, sliceConstraintsRHS, sliceDualVariables, sliceTableauColumn, sliceTableauRow, toString, updateDualEdgeWeights, updatePrimalEdgeWeights, value

Methods inherited from class SimplexStore

countRemainingArtificials, extractSolution, generateCutCandidates, getColumnState, getLowerBound, getLowerBounds, getLowerGap, getRange, getUpperBound, getUpperBounds, getUpperGap, isArtificial, isExcluded, isIncluded, isNegated, isPrintable, isRemainingArtificials, lower, newDualSimplexSolver, newPhasedSimplexSolver, newPrimalSimplexSolver, newStoreFactory, resetEdgeWeights, unbounded, update, updateBasis, updateRange, upper

Methods inherited from class Object

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

Methods inherited from interface Access1D

asCollectable1D, asKeyed1D, asList, axpy, dot, select, supplyTo, toList, toRawCopy1D

Methods inherited from interface Access2D

asCollectable2D, asKeyed2D, byteValue, byteValue, byteValue, byteValue, columns, columns, columns, doubleValue, doubleValue, doubleValue, elements, floatValue, floatValue, floatValue, floatValue, get, intValue, intValue, intValue, intValue, longValue, longValue, longValue, longValue, nonzeros, rows, rows, rows, select, select, shortValue, shortValue, shortValue, shortValue, toRawCopy2D

Methods inherited from interface Mutate1D

reset

Methods inherited from interface Mutate2D

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

Methods inherited from interface Structure2D

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

Field Details

myColDim

private final int myColDim

myPhase1Row

private double[] myPhase1Row

myTableau

private final double[][] myTableau

Constructor Details

DenseTableau

DenseTableau(int mm,
 int nn)

DenseTableau

DenseTableau(LinearStructure linearStructure)

Method Details

doubleValue

public double doubleValue(int row,
 int col)

Description copied from interface: Access2D

Extracts one element of this matrix as a double.

Parameters:

row - A row index.

col - A column index.

Returns:

One matrix element

getColDim

public int getColDim()

Returns:

The number of columns

getRowDim

public int getRowDim()

Returns:

The number of rows

set

public void set(int row,
 int col,
 double value)

doPivot

private void doPivot(int row,
 int col,
 double[] pivotRow)

scale

private void scale(double[] body,
 int col)

doPivot

protected void doPivot(int row,
 int col)

Description copied from class: SimplexTableau

Perform the pivot operation on the tableau – only. Various auxiliary bookkeeping should NOT be done here.

Specified by:

doPivot in class SimplexTableau

shiftColumn

protected void shiftColumn(int col,
 double shift)

Overrides:

shiftColumn in class SimplexStore

copyBasicSolution

void copyBasicSolution(double[] solution)

Specified by:

copyBasicSolution in class SimplexStore

extractValue

double extractValue()

Specified by:

extractValue in class SimplexStore

fixVariable

boolean fixVariable(int index,
 double value)

Specified by:

fixVariable in class SimplexTableau

getInfeasibility

double getInfeasibility()

Specified by:

getInfeasibility in class SimplexTableau

Returns:

The phase 1 objective function value

getReducedCost

double getReducedCost(int je)

Specified by:

getReducedCost in class SimplexStore

getValue

double getValue()

Specified by:

getValue in class SimplexTableau

Returns:

The (phase 2) objective function value

newConstraintsBody

Primitive2D newConstraintsBody()

Specified by:

newConstraintsBody in class SimplexTableau

newConstraintsRHS

Primitive1D newConstraintsRHS()

Specified by:

newConstraintsRHS in class SimplexTableau

newObjective

Primitive1D newObjective()

Specified by:

newObjective in class SimplexTableau

phase1

Primitive1D phase1()

Description copied from class: SimplexStore

The phase-1 objective function.

Specified by:

phase1 in class SimplexStore

removePhase1

void removePhase1()

Specified by:

removePhase1 in class SimplexStore