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 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 ()
Static Public Member Functions
static vtkKMeansDistanceFunctorCalculator *	New ()
static int	IsTypeOf (const char *type)
static vtkKMeansDistanceFunctorCalculator *	SafeDownCast (vtkObjectBase *o)
Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkKMeansDistanceFunctorCalculator ()
virtual	~vtkKMeansDistanceFunctorCalculator ()
Protected Attributes
char *	DistanceExpression
int	TupleSize
vtkFunctionParser *	FunctionParser

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

Reimplemented from vtkKMeansDistanceFunctor.

Definition at line 36 of file vtkKMeansDistanceFunctorCalculator.h.

Constructor & Destructor Documentation

vtkKMeansDistanceFunctorCalculator::vtkKMeansDistanceFunctorCalculator ( ) [protected]

virtual vtkKMeansDistanceFunctorCalculator::~vtkKMeansDistanceFunctorCalculator ( ) [protected, virtual]

Member Function Documentation

static vtkKMeansDistanceFunctorCalculator* vtkKMeansDistanceFunctorCalculator::New ( ) [static]

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkKMeansDistanceFunctor.

static int vtkKMeansDistanceFunctorCalculator::IsTypeOf ( const char * name ) [static]

Return 1 if this class type 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 vtkKMeansDistanceFunctor.

virtual int vtkKMeansDistanceFunctorCalculator::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 vtkKMeansDistanceFunctor.

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

Reimplemented from vtkKMeansDistanceFunctor.

virtual vtkObjectBase* vtkKMeansDistanceFunctorCalculator::NewInstanceInternal ( ) const [protected, virtual]

Reimplemented from vtkKMeansDistanceFunctor.

vtkKMeansDistanceFunctorCalculator* vtkKMeansDistanceFunctorCalculator::NewInstance ( ) const

Reimplemented from vtkKMeansDistanceFunctor.

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

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 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.