gausselim
Class GaussElimModel

java.lang.Object
  gausselim.GaussElimModel

public class GaussElimModel
extends java.lang.Object

Gaussian elimination for solving systems of linear equations.

Author:

Steven Van Impe (steven.vanimpe@ugent.be)

Constructor Summary

GaussElimModel(int order, java.math.MathContext mc)
Create a new model for Gaussian elimination.

Method Summary

void	addChangeListener(javax.swing.event.ChangeListener l) Add a ChangeListener.
void	fireStateChanged(javax.swing.event.ChangeEvent e) Notify all ChangeListeners.
java.math.BigDecimal	getA(int row, int column)
java.math.BigDecimal	getB(int row)
ExampleSystem	getExampleSystem()
java.math.BigDecimal	getL(int row, int column)
java.math.MathContext	getMathContext()
int	getOrder()
PivotingMethod	getPivotingMethod()
java.lang.String	getStatus()
int	getStep()
java.math.BigDecimal	getX(int row)
void	initialize(java.math.BigDecimal[][] a, java.math.BigDecimal[] b) Initialize the system with the specified input matrices.
boolean	isSolved()
void	removeChangeListener(javax.swing.event.ChangeListener l) Remove a ChangeListener.
void	reset() Reset the system.
void	setA(int row, int column, java.math.BigDecimal value) Assign a new value to A(row, column).
void	setB(int row, java.math.BigDecimal value) Assign a new value to b(row).
void	setExampleSystem(ExampleSystem es) Assign a new ExampleSystem to the system.
void	setMathContext(java.math.MathContext mc) Assign a new MathContext to the system.
void	setOrder(int order) Assign a new order (>= 2) to the system.
void	setPivotingMethod(PivotingMethod pm) Assign a new PivotingMethod to the system.
void	solve() Solve the system using backwards substitution.
void	step() Perform a single elimination step.

Methods inherited from class java.lang.Object

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

Constructor Detail

GaussElimModel

public GaussElimModel(int order,
                      java.math.MathContext mc)

Create a new model for Gaussian elimination.

Method Detail

reset

public void reset()

Reset the system.

initialize

public void initialize(java.math.BigDecimal[][] a,
                       java.math.BigDecimal[] b)

Initialize the system with the specified input matrices. This is only allowed at step 1.

getA

public java.math.BigDecimal getA(int row,
                                 int column)

Returns:

A(row, column)

getL

public java.math.BigDecimal getL(int row,
                                 int column)

Returns:

L(row, column)

setA

public void setA(int row,
                 int column,
                 java.math.BigDecimal value)

Assign a new value to A(row, column). This is only allowed at step 1.

getB

public java.math.BigDecimal getB(int row)

Returns:

b(row)

setB

public void setB(int row,
                 java.math.BigDecimal value)

Assign a new value to b(row). This is only allowed at step 1.

getX

public java.math.BigDecimal getX(int row)

Returns:

x(row)

getOrder

public int getOrder()

Returns:

the order of the system

setOrder

public void setOrder(int order)

Assign a new order (>= 2) to the system. This will cause the system to reset.

getStep

public int getStep()

Returns:

the current step in the elimination process

isSolved

public boolean isSolved()

Returns:

whether the solution has been calculated

getStatus

public java.lang.String getStatus()

Returns:

the status of the system

getMathContext

public java.math.MathContext getMathContext()

Returns:

the current MathContext being used

setMathContext

public void setMathContext(java.math.MathContext mc)

Assign a new MathContext to the system. This will cause the system to reset. In case of a null value, the default MathContext.DECIMAL64 is used.

getExampleSystem

public ExampleSystem getExampleSystem()

Returns:

the current ExampleSystem being used

setExampleSystem

public void setExampleSystem(ExampleSystem es)

Assign a new ExampleSystem to the system. This will cause the system to reset. In case of a null value, the default ZeroSystem is used.

getPivotingMethod

public PivotingMethod getPivotingMethod()

Returns:

the current PivotingMethod being used

setPivotingMethod

public void setPivotingMethod(PivotingMethod pm)

Assign a new PivotingMethod to the system. In case of a null value, the default NoPivoting is used.

step

public void step()

Perform a single elimination step.

solve

public void solve()

Solve the system using backwards substitution.

addChangeListener

public void addChangeListener(javax.swing.event.ChangeListener l)

Add a ChangeListener.

removeChangeListener

public void removeChangeListener(javax.swing.event.ChangeListener l)

Remove a ChangeListener.

fireStateChanged

public void fireStateChanged(javax.swing.event.ChangeEvent e)

Notify all ChangeListeners.