Class BTFLinearSystem

java.lang.Object

solvers.linearSystem.LinearSystem

solvers.linearSystem.btf.BTFLinearSystem

public class BTFLinearSystem
extends LinearSystem

This class implements the BTF linear system, using the idea that the matrices only need to be generated once.

Author:

Jack Bradshaw

Field Summary

Fields inherited from class LinearSystem

basis, qnm

Constructor Summary

Constructors

Constructor	Description
BTFLinearSystem(QNModel qnm, CoMoMBasis basis)	Constructor
BTFLinearSystem(QNModel qnm, CoMoMBasis basis, boolean in_place)	Constructor

Method Summary

Modifier and Type	Method	Description
void	initialiseMatricesForClass(PopulationVector current_N, int current_class)	Initialises the matrices of the linear system ready for iteration on current_class at the specified population
void	multiply(BigRational[] lhs_result, BigRational[] rhs_result)	Multiplies the matrices by the values in the previous and current bases.
void	solve()	Solve the linear system in its current configuration
void	update(int current_class_population)	Updates the N_l values in the linear system

Methods inherited from class LinearSystem

computePerformanceMeasures, initialiseForClass

Methods inherited from class Object

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

Constructor Details

BTFLinearSystem

public BTFLinearSystem(QNModel qnm,
 CoMoMBasis basis)
                throws InternalErrorException,
BTFMatrixErrorException,
InconsistentLinearSystemException

Constructor

Parameters:

qnm - The model under study

basis - The basis of the model

Throws:

InternalErrorException

BTFMatrixErrorException

InconsistentLinearSystemException

BTFLinearSystem

public BTFLinearSystem(QNModel qnm,
 CoMoMBasis basis,
 boolean in_place)
                throws InternalErrorException,
BTFMatrixErrorException,
InconsistentLinearSystemException

Constructor

Parameters:

qnm - The model under study

basis - The basis of the model

in_place - Boolean to specify in the LUP decomposition should be in place or not.

Throws:

InternalErrorException

BTFMatrixErrorException

InconsistentLinearSystemException

Method Details

initialiseMatricesForClass

public void initialiseMatricesForClass(PopulationVector current_N,
 int current_class)
                                throws BTFMatrixErrorException,
InternalErrorException,
InconsistentLinearSystemException

Description copied from class: LinearSystem

Initialises the matrices of the linear system ready for iteration on current_class at the specified population

Specified by:

initialiseMatricesForClass in class LinearSystem

Parameters:

current_N - The current population vector

current_class - The current class under consideration

Throws:

BTFMatrixErrorException

InternalErrorException

InconsistentLinearSystemException

solve

public void solve()
           throws OperationNotSupportedException,
InconsistentLinearSystemException,
InternalErrorException,
BTFMatrixErrorException

Description copied from class: LinearSystem

Solve the linear system in its current configuration

Specified by:

solve in class LinearSystem

Throws:

OperationNotSupportedException

InconsistentLinearSystemException

InternalErrorException

BTFMatrixErrorException

update

public void update(int current_class_population)

Description copied from class: LinearSystem

Updates the N_l values in the linear system

Specified by:

update in class LinearSystem

Parameters:

current_class_population - The population in the current class under consideration

multiply

public void multiply(BigRational[] lhs_result,
 BigRational[] rhs_result)
              throws BTFMatrixErrorException

Multiplies the matrices by the values in the previous and current bases.

Parameters:

lhs_result - The Left-Hand-Side of the linear system

rhs_result - The Right-Hand-Side of the linear system

Throws:

BTFMatrixErrorException