nonlinear optimization with a simplex More...

#include <vtkAmoebaMinimizer.h>

Inheritance diagram for vtkAmoebaMinimizer:

Collaboration diagram for vtkAmoebaMinimizer:

Public Types
typedef vtkObject	Superclass

Public Member Functions
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class. More...

vtkAmoebaMinimizer *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses. More...

void	SetFunction (void(f)(void ), void *arg)
	Specify the function to be minimized. More...

void	SetFunctionArgDelete (void(f)(void ))
	Set a function to call when a void* argument is being discarded. More...

const char *	GetParameterName (int i)
	For completeness, an unchecked method to get the name for particular parameter (the result will be nullptr if no name was set). More...

int	GetNumberOfParameters ()
	Get the number of parameters that have been set. More...

void	Initialize ()
	Initialize the minimizer. More...

virtual void	Minimize ()
	Iterate until the minimum is found to within the specified tolerance, or until the MaxIterations has been reached. More...

virtual int	Iterate ()
	Perform one iteration of minimization. More...

void	EvaluateFunction ()
	Evaluate the function. More...


void	SetParameterValue (const char *name, double value)
	Set the initial value for the specified parameter. More...

void	SetParameterValue (int i, double value)
	Set the initial value for the specified parameter. More...


void	SetParameterScale (const char *name, double scale)
	Set the scale to use when modifying a parameter, i.e. More...

double	GetParameterScale (const char *name)
	Set the scale to use when modifying a parameter, i.e. More...

void	SetParameterScale (int i, double scale)
	Set the scale to use when modifying a parameter, i.e. More...

double	GetParameterScale (int i)
	Set the scale to use when modifying a parameter, i.e. More...


double	GetParameterValue (const char *name)
	Get the value of a parameter at the current stage of the minimization. More...

double	GetParameterValue (int i)
	Get the value of a parameter at the current stage of the minimization. More...


virtual void	SetFunctionValue (double)
	Get the function value resulting from the minimization. More...

double	GetFunctionValue ()
	Get the function value resulting from the minimization. More...


virtual void	SetContractionRatio (double)
	Set the amoeba contraction ratio. More...

virtual double	GetContractionRatio ()
	Set the amoeba contraction ratio. More...


virtual void	SetExpansionRatio (double)
	Set the amoeba expansion ratio. More...

virtual double	GetExpansionRatio ()
	Set the amoeba expansion ratio. More...


virtual void	SetTolerance (double)
	Specify the value tolerance to aim for during the minimization. More...

virtual double	GetTolerance ()
	Specify the value tolerance to aim for during the minimization. More...


virtual void	SetParameterTolerance (double)
	Specify the parameter tolerance to aim for during the minimization. More...

virtual double	GetParameterTolerance ()
	Specify the parameter tolerance to aim for during the minimization. More...


virtual void	SetMaxIterations (int)
	Specify the maximum number of iterations to try before giving up. More...

virtual int	GetMaxIterations ()
	Specify the maximum number of iterations to try before giving up. More...


virtual int	GetIterations ()
	Return the number of iterations that have been performed. More...


virtual int	GetFunctionEvaluations ()
	Return the number of times that the function has been evaluated. More...

Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)

virtual void	DebugOn ()
	Turn debugging output on. More...

virtual void	DebugOff ()
	Turn debugging output off. More...

bool	GetDebug ()
	Get the value of the debug flag. More...

void	SetDebug (bool debugFlag)
	Set the value of the debug flag. More...

virtual void	Modified ()
	Update the modification time for this object. More...

virtual vtkMTimeType	GetMTime ()
	Return this object's modified time. More...

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObservers (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkTypeBool	HasObserver (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method. More...

int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not. More...

int	InvokeEvent (const char event, void callData)
	This method invokes an event and return whether the event was aborted or not. More...

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string. More...

virtual void	Delete ()
	Delete a VTK object. More...

virtual void	FastDelete ()
	Delete a reference to this object. More...

void	InitializeObjectBase ()

void	Print (ostream &os)
	Print an object to an ostream. More...

virtual void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object). More...

virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object). More...

int	GetReferenceCount ()
	Return the current reference count of this object. More...

void	SetReferenceCount (int)
	Sets the reference count. More...

void	PrintRevisions (ostream &)
	Legacy. More...

virtual void	PrintHeader (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses. More...

virtual void	PrintTrailer (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses. More...

Static Public Member Functions
static vtkAmoebaMinimizer *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkAmoebaMinimizer *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

static void	BreakOnError ()
	This method is called when vtkErrorMacro executes. More...

static void	SetGlobalWarningDisplay (int val)
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static int	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class. More...

static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkAmoebaMinimizer ()

	~vtkAmoebaMinimizer () override

Protected Member Functions inherited from vtkObject
	vtkObject ()

	~vtkObject () override

void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events. More...

void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events. More...

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	CollectRevisions (ostream &)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Protected Attributes
void(*	Function )(void *)

void(*	FunctionArgDelete )(void *)

void *	FunctionArg

int	NumberOfParameters

char **	ParameterNames

double *	ParameterValues

double *	ParameterScales

double	FunctionValue

double	ContractionRatio

double	ExpansionRatio

double	Tolerance

double	ParameterTolerance

int	MaxIterations

int	Iterations

int	FunctionEvaluations

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Detailed Description

nonlinear optimization with a simplex

vtkAmoebaMinimizer will modify a set of parameters in order to find the minimum of a specified function. The method used is commonly known as the amoeba method, it constructs an n-dimensional simplex in parameter space (i.e. a tetrahedron if the number or parameters is 3) and moves the vertices around parameter space until a local minimum is found. The amoeba method is robust, reasonably efficient, but is not guaranteed to find the global minimum if several local minima exist.

Tests:: vtkAmoebaMinimizer (Tests)

Definition at line 38 of file vtkAmoebaMinimizer.h.

Member Typedef Documentation

typedef vtkObject vtkAmoebaMinimizer::Superclass

Definition at line 42 of file vtkAmoebaMinimizer.h.

Constructor & Destructor Documentation

vtkAmoebaMinimizer::vtkAmoebaMinimizer ( )

protected

vtkAmoebaMinimizer::~vtkAmoebaMinimizer ( )

overrideprotected

Member Function Documentation

static vtkAmoebaMinimizer* vtkAmoebaMinimizer::New ( )

static

static vtkTypeBool vtkAmoebaMinimizer::IsTypeOf ( const char * type )

static

virtual vtkTypeBool vtkAmoebaMinimizer::IsA ( const char * name )

virtual

Return 1 if this class is the same type of (or a subclass of) the named class.

Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkObjectBase.

static vtkAmoebaMinimizer* vtkAmoebaMinimizer::SafeDownCast ( vtkObjectBase * o )

static

virtual vtkObjectBase* vtkAmoebaMinimizer::NewInstanceInternal ( ) const

protectedvirtual

vtkAmoebaMinimizer* vtkAmoebaMinimizer::NewInstance ( ) const

void vtkAmoebaMinimizer::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

overridevirtual

Methods invoked by print to print information about the object including superclasses.

Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkObject.

void vtkAmoebaMinimizer::SetFunction	(	void()(void )	f,
		void *	arg
	)

Specify the function to be minimized.

When this function is called, it must get the parameter values by calling GetParameterValue() for each parameter, and then must call SetFunctionValue() to tell the minimizer what the result of the function evaluation was. The number of function evaluations used for the minimization can be retrieved using GetFunctionEvaluations().

void vtkAmoebaMinimizer::SetFunctionArgDelete ( void(*)(void *) f )

Set a function to call when a void* argument is being discarded.

void vtkAmoebaMinimizer::SetParameterValue	(	const char *	name,
		double	value
	)

Set the initial value for the specified parameter.

Calling this function for any parameter will reset the Iterations and the FunctionEvaluations counts to zero. You must also use SetParameterScale() to specify the step size by which the parameter will be modified during the minimization. It is preferable to specify parameters by name, rather than by number.

void vtkAmoebaMinimizer::SetParameterValue	(	int	i,
		double	value
	)

Set the initial value for the specified parameter.

Calling this function for any parameter will reset the Iterations and the FunctionEvaluations counts to zero. You must also use SetParameterScale() to specify the step size by which the parameter will be modified during the minimization. It is preferable to specify parameters by name, rather than by number.

void vtkAmoebaMinimizer::SetParameterScale	(	const char *	name,
		double	scale
	)

Set the scale to use when modifying a parameter, i.e.

the initial amount by which the parameter will be modified during the search for the minimum. It is preferable to identify scalars by name rather than by number.

double vtkAmoebaMinimizer::GetParameterScale ( const char * name )

Set the scale to use when modifying a parameter, i.e.

the initial amount by which the parameter will be modified during the search for the minimum. It is preferable to identify scalars by name rather than by number.

void vtkAmoebaMinimizer::SetParameterScale	(	int	i,
		double	scale
	)

Set the scale to use when modifying a parameter, i.e.

the initial amount by which the parameter will be modified during the search for the minimum. It is preferable to identify scalars by name rather than by number.

double vtkAmoebaMinimizer::GetParameterScale ( int i )

inline

Set the scale to use when modifying a parameter, i.e.

the initial amount by which the parameter will be modified during the search for the minimum. It is preferable to identify scalars by name rather than by number.

Definition at line 85 of file vtkAmoebaMinimizer.h.

double vtkAmoebaMinimizer::GetParameterValue ( const char * name )

Get the value of a parameter at the current stage of the minimization.

Call this method within the function that you are minimizing in order to get the current parameter values. It is preferable to specify parameters by name rather than by index.

double vtkAmoebaMinimizer::GetParameterValue ( int i )

inline

Get the value of a parameter at the current stage of the minimization.

Call this method within the function that you are minimizing in order to get the current parameter values. It is preferable to specify parameters by name rather than by index.

Definition at line 96 of file vtkAmoebaMinimizer.h.

const char* vtkAmoebaMinimizer::GetParameterName ( int i )

inline

For completeness, an unchecked method to get the name for particular parameter (the result will be nullptr if no name was set).

Definition at line 103 of file vtkAmoebaMinimizer.h.

int vtkAmoebaMinimizer::GetNumberOfParameters ( )

inline

Get the number of parameters that have been set.

Definition at line 108 of file vtkAmoebaMinimizer.h.

void vtkAmoebaMinimizer::Initialize ( )

Initialize the minimizer.

This will reset the number of parameters to zero so that the minimizer can be reused.

virtual void vtkAmoebaMinimizer::Minimize ( )

virtual

Iterate until the minimum is found to within the specified tolerance, or until the MaxIterations has been reached.

virtual int vtkAmoebaMinimizer::Iterate ( )

virtual

Perform one iteration of minimization.

Returns zero if the tolerance stopping criterion has been met.

virtual void vtkAmoebaMinimizer::SetFunctionValue ( double )

virtual

Get the function value resulting from the minimization.

double vtkAmoebaMinimizer::GetFunctionValue ( )

inline

Get the function value resulting from the minimization.

Definition at line 133 of file vtkAmoebaMinimizer.h.

virtual void vtkAmoebaMinimizer::SetContractionRatio ( double )

virtual

Set the amoeba contraction ratio.

The default value of 0.5 gives fast convergence, but larger values such as 0.6 or 0.7 provide greater stability.

virtual double vtkAmoebaMinimizer::GetContractionRatio ( )

virtual

Set the amoeba contraction ratio.

The default value of 0.5 gives fast convergence, but larger values such as 0.6 or 0.7 provide greater stability.

virtual void vtkAmoebaMinimizer::SetExpansionRatio ( double )

virtual

Set the amoeba expansion ratio.

The default value is 2.0, which provides rapid expansion. Values between 1.1 and 2.0 are valid.

virtual double vtkAmoebaMinimizer::GetExpansionRatio ( )

virtual

Set the amoeba expansion ratio.

The default value is 2.0, which provides rapid expansion. Values between 1.1 and 2.0 are valid.

virtual void vtkAmoebaMinimizer::SetTolerance ( double )

virtual

Specify the value tolerance to aim for during the minimization.

virtual double vtkAmoebaMinimizer::GetTolerance ( )

virtual

Specify the value tolerance to aim for during the minimization.

virtual void vtkAmoebaMinimizer::SetParameterTolerance ( double )

virtual

Specify the parameter tolerance to aim for during the minimization.

virtual double vtkAmoebaMinimizer::GetParameterTolerance ( )

virtual

Specify the parameter tolerance to aim for during the minimization.

virtual void vtkAmoebaMinimizer::SetMaxIterations ( int )

virtual

Specify the maximum number of iterations to try before giving up.

virtual int vtkAmoebaMinimizer::GetMaxIterations ( )

virtual

Specify the maximum number of iterations to try before giving up.

virtual int vtkAmoebaMinimizer::GetIterations ( )

virtual

Return the number of iterations that have been performed.

This is not necessarily the same as the number of function evaluations.

virtual int vtkAmoebaMinimizer::GetFunctionEvaluations ( )

virtual

Return the number of times that the function has been evaluated.

void vtkAmoebaMinimizer::EvaluateFunction ( )

Evaluate the function.

This is usually called internally by the minimization code, but it is provided here as a public method.

Member Data Documentation

void(* vtkAmoebaMinimizer::Function) (void *)

protected

Definition at line 204 of file vtkAmoebaMinimizer.h.

void(* vtkAmoebaMinimizer::FunctionArgDelete) (void *)

protected

Definition at line 205 of file vtkAmoebaMinimizer.h.

void* vtkAmoebaMinimizer::FunctionArg

protected

Definition at line 206 of file vtkAmoebaMinimizer.h.

int vtkAmoebaMinimizer::NumberOfParameters

protected

Definition at line 208 of file vtkAmoebaMinimizer.h.

char** vtkAmoebaMinimizer::ParameterNames

protected

Definition at line 209 of file vtkAmoebaMinimizer.h.

double* vtkAmoebaMinimizer::ParameterValues

protected

Definition at line 210 of file vtkAmoebaMinimizer.h.

double* vtkAmoebaMinimizer::ParameterScales

protected

Definition at line 211 of file vtkAmoebaMinimizer.h.

double vtkAmoebaMinimizer::FunctionValue

protected

Definition at line 212 of file vtkAmoebaMinimizer.h.

double vtkAmoebaMinimizer::ContractionRatio

protected

Definition at line 214 of file vtkAmoebaMinimizer.h.

double vtkAmoebaMinimizer::ExpansionRatio

protected

Definition at line 215 of file vtkAmoebaMinimizer.h.

double vtkAmoebaMinimizer::Tolerance

protected

Definition at line 217 of file vtkAmoebaMinimizer.h.

double vtkAmoebaMinimizer::ParameterTolerance

protected

Definition at line 218 of file vtkAmoebaMinimizer.h.

int vtkAmoebaMinimizer::MaxIterations

protected

Definition at line 219 of file vtkAmoebaMinimizer.h.

int vtkAmoebaMinimizer::Iterations

protected

Definition at line 220 of file vtkAmoebaMinimizer.h.

int vtkAmoebaMinimizer::FunctionEvaluations

protected

Definition at line 221 of file vtkAmoebaMinimizer.h.

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

/home/demarle/Source/VTK/release/8.2/build/Utilities/Doxygen/dox/Common/Math/vtkAmoebaMinimizer.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation