gamsLocOpt Class Reference

Calls a GAMS-solver to solve the original problem with different bounds, fixed variables or another starting point. More...

#include <gams.h>

Inheritance diagram for gamsLocOpt:

[legend]

Collaboration diagram for gamsLocOpt:

[legend]

List of all members.

Public Member Functions
	gamsLocOpt (Pointer< MinlpProblem > prob_, Pointer< Param > param_, Pointer< ostream > out_solver_p_=out_out_p, Pointer< ostream > out_solver_log_p_=out_log_p)
	~gamsLocOpt ()
int	solve ()
	Solves the problem.
int	solve (dvector &start)
	Solves the problem for a starting point.
dvector	get_lag_multipliers ()
Private Member Functions
int	do_preprocessing (const dvector &start)
	Calls a preprocessing program.
Private Attributes
Pointer< Param >	param
Pointer< MinlpProblem >	prob
bool	second_run
dvector	lower_discr
dvector	upper_discr
dvector	lower
dvector	upper
dvector	con_val
dvector	duals_con
dvector	duals_var
ivector	basind_con
ivector	basind_var
int	model_status
int	solver_status
int	recent_calls
Pointer< char >	tmpsolfn
char **	args
int	optfile
int	subsolver
Pointer< char >	solvername
void *	iolibsave
char **	preprocessargs
	Skript name for a preprocessing step.
bool	preprocess_keepgdx
bool	write_solcand
bool	write_startpoint
double	rd
	A random value to identify points, we process.
LocOptPreprocessing *	preprocessing
Static Private Attributes
static void *	preprocess_handle
Friends
class	gams

---

Detailed Description

Calls a GAMS-solver to solve the original problem with different bounds, fixed variables or another starting point.

Parameters:

	GAMS	write solution candidates options $ 0$ default 0 level 2 If 0, no solution candidates are written to gdx files. If greater 0, every solution candidate is written to a file solcand$<$Value$>$$<$Randomnumber$>$.gdx, where Value is the objective value. If more files were written than the number, which is specified by this parameter, the file with the worst solution candidate is removed again.
	GAMS	write startpoint options $ 0$ default 0 level 2 If greater 0, every starting point of a local search is written to a file startpoint$<$Randomnumber$>$.gdx.
	GAMS	LocOpt solver options name of GAMS solver default conopt level 2 Name of the GAMS solver to use to solve the original MINLP with fixed binaries.
	GAMS	LocOpt optionfile options $ 0$ default 0 level 2 The number of the optionalfile for the local optimizer. 0 for no optionfile.
	GAMS	LocOpt preprocessing options name of a script default none level 2 The library to link which defines some algorithm to do some preprocessing for a given startpoint before giving it to the local optimizer.

Definition at line 274 of file gams.h.

---

Constructor & Destructor Documentation

gamsLocOpt::gamsLocOpt	(	Pointer< MinlpProblem >	prob_,
		Pointer< Param >	param_,
		Pointer< ostream >	out_solver_p_ = out_out_p,
		Pointer< ostream >	out_solver_log_p_ = out_log_p
	)

gamsLocOpt::~gamsLocOpt

(

)

---

Member Function Documentation

int gamsLocOpt::do_preprocessing

(

const dvector &

start

)

[private]

Calls a preprocessing program.

The improved point will be written to sol_point.

int gamsLocOpt::solve

(

)

[inline, virtual]

Solves the problem.

Abstract.

Returns:

A status code: 0, if all went right.

See also:

solve(dvector&)

Implements Solver.

Definition at line 329 of file gams.h.

int gamsLocOpt::solve

(

dvector &

x

)

[virtual]

Solves the problem for a starting point.

Sets sol_point to x. Calls solve().

Parameters:

x

The dvector to start the solver with.

See also:

solve()

Reimplemented from Solver.

dvector gamsLocOpt::get_lag_multipliers

(

)

[virtual]

Implements LocOpt.

---

Friends And Related Function Documentation

friend class gams [friend]

Definition at line 275 of file gams.h.

---

Member Data Documentation

Pointer<Param> gamsLocOpt::param [private]

Definition at line 277 of file gams.h.

Pointer<MinlpProblem> gamsLocOpt::prob [private]

Definition at line 278 of file gams.h.

bool gamsLocOpt::second_run [private]

Definition at line 279 of file gams.h.

dvector gamsLocOpt::lower_discr [private]

Definition at line 281 of file gams.h.

dvector gamsLocOpt::upper_discr [private]

Definition at line 282 of file gams.h.

dvector gamsLocOpt::lower [private]

Definition at line 283 of file gams.h.

dvector gamsLocOpt::upper [private]

Definition at line 284 of file gams.h.

dvector gamsLocOpt::con_val [private]

Definition at line 286 of file gams.h.

dvector gamsLocOpt::duals_con [private]

Definition at line 287 of file gams.h.

dvector gamsLocOpt::duals_var [private]

Definition at line 288 of file gams.h.

ivector gamsLocOpt::basind_con [private]

Definition at line 289 of file gams.h.

ivector gamsLocOpt::basind_var [private]

Definition at line 290 of file gams.h.

int gamsLocOpt::model_status [private]

Definition at line 292 of file gams.h.

int gamsLocOpt::solver_status [private]

Definition at line 292 of file gams.h.

int gamsLocOpt::recent_calls [private]

Definition at line 294 of file gams.h.

Pointer<char> gamsLocOpt::tmpsolfn [private]

Definition at line 295 of file gams.h.

char** gamsLocOpt::args [private]

Definition at line 296 of file gams.h.

int gamsLocOpt::optfile [private]

Definition at line 298 of file gams.h.

int gamsLocOpt::subsolver [private]

Definition at line 299 of file gams.h.

Pointer<char> gamsLocOpt::solvername [private]

Definition at line 300 of file gams.h.

void* gamsLocOpt::iolibsave [private]

Definition at line 301 of file gams.h.

char** gamsLocOpt::preprocessargs [private]

Skript name for a preprocessing step.

Definition at line 305 of file gams.h.

bool gamsLocOpt::preprocess_keepgdx [private]

Definition at line 306 of file gams.h.

bool gamsLocOpt::write_solcand [private]

Definition at line 308 of file gams.h.

bool gamsLocOpt::write_startpoint [private]

Definition at line 309 of file gams.h.

double gamsLocOpt::rd [private]

A random value to identify points, we process.

Definition at line 313 of file gams.h.

void* gamsLocOpt::preprocess_handle [static, private]

Definition at line 320 of file gams.h.

LocOptPreprocessing* gamsLocOpt::preprocessing [private]

Definition at line 322 of file gams.h.

---

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

• gams.h