hermes::LinearProgram Class Reference

#include <linprog.h>

Public Member Functions
	LinearProgram (const char *name)
	~LinearProgram ()
void	DefineDimension (int num_vars, int num_constraints)
void	AddConstraint (const std::string &base_name, int op_type, double lb, double ub)
void	SetConstraintCoeff (int var, double val)
void	SetVariableBounds (const std::string &base_name, int var, int op_type, double lb, double ub)
void	SetObjective (int objective)
void	SetObjectiveCoeff (int var, double val)
void	Solve ()
bool	IsOptimal ()
double	GetSolution ()
double	GetVariable (int var)
std::vector< double >	ToVector ()

Private Attributes
int	num_vars_
int	num_constraints_
glp_prob *	lp_
std::vector< int >	ia_
std::vector< int >	ja_
std::vector< double >	ar_
size_t	cur_constraint_
size_t	result_

Detailed Description

A structure to represent linear program

Constructor & Destructor Documentation

LinearProgram()

hermes::LinearProgram::LinearProgram ( const char *  name )

inlineexplicit

Initialize linear program solver with name.

~LinearProgram()

hermes::LinearProgram::~LinearProgram ( )

inline

Clean up resources used by the GLPK solver.

Member Function Documentation

DefineDimension()

void hermes::LinearProgram::DefineDimension ( int  num_vars, int  num_constraints  )

inline

Define the problem size using num_vars and num_constraints.

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AddConstraint()

void hermes::LinearProgram::AddConstraint ( const std::string &  base_name, int  op_type, double  lb, double  ub  )

inline

Add a constraint to the GLPK solver.

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SetConstraintCoeff()

void hermes::LinearProgram::SetConstraintCoeff ( int  var, double  val  )

inline

Set coefficient value as val for the var variable.

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SetVariableBounds()

void hermes::LinearProgram::SetVariableBounds ( const std::string &  base_name, int  var, int  op_type, double  lb, double  ub  )

inline

Set the upper and lower bound for var variable.

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SetObjective()

void hermes::LinearProgram::SetObjective ( int  objective )

inline

Set the objective function to optimize.

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SetObjectiveCoeff()

void hermes::LinearProgram::SetObjectiveCoeff ( int  var, double  val  )

inline

Set the coefficients of objective function.

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Solve()

void hermes::LinearProgram::Solve ( )

inline

Solve the problem.

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IsOptimal()

bool hermes::LinearProgram::IsOptimal ( )

inline

Check if optimal solution exists.

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GetSolution()

double hermes::LinearProgram::GetSolution ( )

inline

Get solution.

GetVariable()

double hermes::LinearProgram::GetVariable ( int  var )

inline

Get the values for optimal solution.

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ToVector()

std::vector<double> hermes::LinearProgram::ToVector ( )

inline

Collect the values as a vector.

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Member Data Documentation

num_vars_

int hermes::LinearProgram::num_vars_

private

number of variables

num_constraints_

int hermes::LinearProgram::num_constraints_

private

number of constraints

lp_

glp_prob* hermes::LinearProgram::lp_

private

pointer to GLPK problem solver

ia_

std::vector<int> hermes::LinearProgram::ia_

private

The "i" in A[i][j]

ja_

std::vector<int> hermes::LinearProgram::ja_

private

The "j" in A[i][j]

ar_

std::vector<double> hermes::LinearProgram::ar_

private

values for A[i][j]

cur_constraint_

size_t hermes::LinearProgram::cur_constraint_

private

current constraint

result_

size_t hermes::LinearProgram::result_

private

result of solver

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The documentation for this class was generated from the following file:

• /home/runner/work/hermes/hermes/src/dpe/linprog.h