measure distance from k-means cluster centers using a user-specified expression More...

#include <vtkKMeansDistanceFunctorCalculator.h>

Inheritance diagram for vtkKMeansDistanceFunctorCalculator:

Collaboration diagram for vtkKMeansDistanceFunctorCalculator:

Public Types
typedef vtkKMeansDistanceFunctor	Superclass

Public Types inherited from vtkKMeansDistanceFunctor
typedef vtkObject	Superclass

Public Member Functions
virtual int	IsA (const char *type)

vtkKMeansDistanceFunctorCalculator *	NewInstance () const

virtual void	PrintSelf (ostream &os, vtkIndent indent)

virtual void	operator() (double &, vtkVariantArray , vtkVariantArray )


virtual void	SetDistanceExpression (const char *)

virtual char *	GetDistanceExpression ()


virtual void	SetFunctionParser (vtkFunctionParser *)

virtual vtkFunctionParser *	GetFunctionParser ()

Public Member Functions inherited from vtkKMeansDistanceFunctor
vtkKMeansDistanceFunctor *	NewInstance () const

virtual vtkVariantArray *	GetEmptyTuple (vtkIdType dimension)

virtual void	PairwiseUpdate (vtkTable clusterCenters, vtkIdType row, vtkVariantArray data, vtkIdType dataCardinality, vtkIdType totalCardinality)

virtual void	PerturbElement (vtkTable , vtkTable , vtkIdType, vtkIdType, vtkIdType, double)

virtual void *	AllocateElementArray (vtkIdType size)

virtual void	DeallocateElementArray (void *)

virtual vtkAbstractArray *	CreateCoordinateArray ()

virtual void	PackElements (vtkTable curTable, void vElements)

virtual int	GetDataType ()

virtual void	UnPackElements (vtkTable curTable, vtkTable newTable, void vLocalElements, void vGlobalElements, int np)

virtual void	UnPackElements (vtkTable curTable, void vLocalElements, vtkIdType numRows, vtkIdType numCols)

Static Public Member Functions
static vtkKMeansDistanceFunctorCalculator *	New ()

static int	IsTypeOf (const char *type)

static vtkKMeansDistanceFunctorCalculator *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkKMeansDistanceFunctor
static vtkKMeansDistanceFunctor *	New ()

static int	IsTypeOf (const char *type)

static vtkKMeansDistanceFunctor *	SafeDownCast (vtkObjectBase *o)

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkKMeansDistanceFunctorCalculator ()

virtual	~vtkKMeansDistanceFunctorCalculator ()

Protected Member Functions inherited from vtkKMeansDistanceFunctor
	vtkKMeansDistanceFunctor ()

virtual	~vtkKMeansDistanceFunctor ()

Protected Attributes
char *	DistanceExpression

int	TupleSize

vtkFunctionParser *	FunctionParser

Protected Attributes inherited from vtkKMeansDistanceFunctor
vtkVariantArray *	EmptyTuple

vtkTable *	CenterUpdates

Detailed Description

measure distance from k-means cluster centers using a user-specified expression

This is a subclass of the default k-means distance functor that allows the user to specify a distance function as a string. The provided expression is evaluated whenever the parenthesis operator is invoked but this is much slower than the default distance calculation.

User-specified distance expressions should be written in terms of two vector variables named "x" and "y". The length of the vectors will be determined by the k-means request and all columns of interest in the request must contain values that may be converted to a floating point representation. (Strings and vtkObject pointers are not allowed.) An example distance expression is "sqrt( (x0-y0)^2 + (x1-y1)^2 )" which computes Euclidian distance in a plane defined by the first 2 coordinates of the vectors specified.

Tests:: vtkKMeansDistanceFunctorCalculator (Tests)

Definition at line 32 of file vtkKMeansDistanceFunctorCalculator.h.

Member Typedef Documentation

typedef vtkKMeansDistanceFunctor vtkKMeansDistanceFunctorCalculator::Superclass

Definition at line 36 of file vtkKMeansDistanceFunctorCalculator.h.

Constructor & Destructor Documentation

vtkKMeansDistanceFunctorCalculator::vtkKMeansDistanceFunctorCalculator ( )

protected

virtual vtkKMeansDistanceFunctorCalculator::~vtkKMeansDistanceFunctorCalculator ( )

protectedvirtual

Member Function Documentation

static vtkKMeansDistanceFunctorCalculator* vtkKMeansDistanceFunctorCalculator::New ( )

static

static int vtkKMeansDistanceFunctorCalculator::IsTypeOf ( const char * type )

static

virtual int vtkKMeansDistanceFunctorCalculator::IsA ( const char * type )

virtual

Reimplemented from vtkKMeansDistanceFunctor.

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

static

virtual vtkObjectBase* vtkKMeansDistanceFunctorCalculator::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkKMeansDistanceFunctor.

vtkKMeansDistanceFunctorCalculator* vtkKMeansDistanceFunctorCalculator::NewInstance ( ) const

virtual void vtkKMeansDistanceFunctorCalculator::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

virtual

Reimplemented from vtkKMeansDistanceFunctor.

virtual void vtkKMeansDistanceFunctorCalculator::operator()	(	double &	,
		vtkVariantArray *	,
		vtkVariantArray *
	)

virtual

Compute the distance from one observation to another, returning the distance in the first argument.

Reimplemented from vtkKMeansDistanceFunctor.

virtual void vtkKMeansDistanceFunctorCalculator::SetDistanceExpression ( const char * )

virtual

Set/get the distance function expression.

virtual char* vtkKMeansDistanceFunctorCalculator::GetDistanceExpression ( )

virtual

Set/get the distance function expression.

virtual void vtkKMeansDistanceFunctorCalculator::SetFunctionParser ( vtkFunctionParser * )

virtual

Set/get the string containing an expression which evaluates to the distance metric used for k-means computation. The scalar variables "x0", "x1", ... "xn" and "y0", "y1", ..., "yn" refer to the coordinates involved in the computation.

virtual vtkFunctionParser* vtkKMeansDistanceFunctorCalculator::GetFunctionParser ( )

virtual

Set/get the string containing an expression which evaluates to the distance metric used for k-means computation. The scalar variables "x0", "x1", ... "xn" and "y0", "y1", ..., "yn" refer to the coordinates involved in the computation.