MINOTAUR_AMPL::AMPLHessian Class Reference

AMPLHessian class has methods to call Hessian of Lagrangian evaluation routines of AMPL. This class is not meant to calculate Hessian of native Minotaur functions. More...

#include <AMPLHessian.h>

Inheritance diagram for MINOTAUR_AMPL::AMPLHessian:

Collaboration diagram for MINOTAUR_AMPL::AMPLHessian:

Public Member Functions
	AMPLHessian (AMPLInterfacePtr iface)
	Construct AMPLHessian using an AMPL(ASL) interface. More...
	~AMPLHessian ()
	Destroy.
Minotaur::UInt	getNumNz () const
	Return the number of non-zeros in the Hessian of Lagrangian. More...
void	fillRowColIndices (Minotaur::UInt *iRow, Minotaur::UInt *jCol)
	Fill in row and column indices of nonzeros in Hessian of Lagrangian. More...
void	fillRowColValues (const double *x, double obj_mult, const double *con_mult, double *values, int *error)
	Evaluate Hessian of Lagrangian at a given point x, row-wise. More...
void	negateObj ()
	Ugly hack for maximization problems. More...
Public Member Functions inherited from Minotaur::HessianOfLag
	HessianOfLag ()
	Default constructor.
	HessianOfLag (Problem *p)
virtual	~HessianOfLag ()
	Destroy. More...
virtual UInt	getNumNz () const
virtual void	fillRowColIndices (UInt *irow, UInt *jcol)
virtual void	fillRowColValues (const double *x, double obj_mult, const double *con_mult, double *values, int *error)
virtual void	negateObj ()
	Ugly hack to solve maximization problem. TODO: delete it. More...
virtual void	setupRowCol ()
virtual void	write (std::ostream &out) const

Detailed Description

AMPLHessian class has methods to call Hessian of Lagrangian evaluation routines of AMPL. This class is not meant to calculate Hessian of native Minotaur functions.

Constructor & Destructor Documentation

AMPLHessian()

AMPLHessian::AMPLHessian

(

AMPLInterfacePtr

iface

)

Construct AMPLHessian using an AMPL(ASL) interface.

Parameters

[in]

iface

Pointer to AMPLInterface class from which we read the instance.

Member Function Documentation

fillRowColIndices()

void AMPLHessian::fillRowColIndices ( Minotaur::UInt *  iRow, Minotaur::UInt *  jCol  )

virtual

Fill in row and column indices of nonzeros in Hessian of Lagrangian.

Given arrays irow and jcol, fill in the row and column index of each non-zero in the Hessian of Lagrangian. The entries are ordered by rows.

Parameters

[out]	jcol	Array of size returned by getNumNz().
[out]	irow	Array of size returned by getNumNz().

Reimplemented from Minotaur::HessianOfLag.

fillRowColValues()

void AMPLHessian::fillRowColValues ( const double *  x, double  obj_mult, const double *  con_mult, double *  values, int *  error  )

virtual

Evaluate Hessian of Lagrangian at a given point x, row-wise.

Parameters

[in]	x	The point at which Hessian of Lagrangian is to be evaluated.
[in]	obj_mult	The multiplier for the objective.
[in]	con_mult	Array of multipliers for constraints.
[out]	values	The array of size returned by getNumNz() into which values are saved.
[out]	error	is set to a nonzero value if a problem is encountered, otherwise it is left undisturbed.

Reimplemented from Minotaur::HessianOfLag.

getNumNz()

Minotaur::UInt AMPLHessian::getNumNz ( ) const

virtual

Return the number of non-zeros in the Hessian of Lagrangian.

Reimplemented from Minotaur::HessianOfLag.

negateObj()

void AMPLHessian::negateObj ( )

virtual

Ugly hack for maximization problems.

Reimplemented from Minotaur::HessianOfLag.

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

• /home/amahajan/tmp/minotaur-test/src/interfaces/AMPLHessian.h
• /home/amahajan/tmp/minotaur-test/src/interfaces/AMPLHessian.cpp