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vtkKMeansDistanceFunctorCalculator Class Reference

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

#include <vtkKMeansDistanceFunctorCalculator.h>

Inheritance diagram for vtkKMeansDistanceFunctorCalculator:
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Collaboration diagram for vtkKMeansDistanceFunctorCalculator:
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Public Types

typedef vtkKMeansDistanceFunctor Superclass
 
- Public Types inherited from vtkKMeansDistanceFunctor
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...
 
vtkKMeansDistanceFunctorCalculatorNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses. More...
 
void operator() (double &, vtkVariantArray *, vtkVariantArray *) override
 Compute the distance from one observation to another, returning the distance in the first argument. More...
 
virtual void SetDistanceExpression (const char *)
 Set/get the distance function expression. More...
 
virtual char * GetDistanceExpression ()
 
virtual void SetFunctionParser (vtkFunctionParser *)
 Set/get the string containing an expression which evaluates to the distance metric used for k-means computation. More...
 
virtual vtkFunctionParserGetFunctionParser ()
 
- Public Member Functions inherited from vtkKMeansDistanceFunctor
vtkKMeansDistanceFunctorNewInstance () const
 
virtual vtkVariantArrayGetEmptyTuple (vtkIdType dimension)
 Return an empty tuple. More...
 
virtual void PairwiseUpdate (vtkTable *clusterCenters, vtkIdType row, vtkVariantArray *data, vtkIdType dataCardinality, vtkIdType totalCardinality)
 This is called once per observation per run per iteration in order to assign the observation to its nearest cluster center after the distance functor has been evaluated for all the cluster centers. More...
 
virtual void PerturbElement (vtkTable *, vtkTable *, vtkIdType, vtkIdType, vtkIdType, double)
 When a cluster center (1) has no observations that are closer to it than other cluster centers or (2) has exactly the same coordinates as another cluster center, its coordinates should be perturbed. More...
 
virtual void * AllocateElementArray (vtkIdType size)
 Allocate an array large enough to hold size coordinates and return a void pointer to this array. More...
 
virtual void DeallocateElementArray (void *)
 Free an array allocated with AllocateElementArray. More...
 
virtual vtkAbstractArrayCreateCoordinateArray ()
 Return a vtkAbstractArray capable of holding cluster center coordinates. More...
 
virtual void PackElements (vtkTable *curTable, void *vElements)
 Pack the cluster center coordinates in vElements into columns of curTable. More...
 
virtual void UnPackElements (vtkTable *curTable, vtkTable *newTable, void *vLocalElements, void *vGlobalElements, int np)
 Unpack the cluster center coordinates in vElements into columns of curTable. More...
 
virtual void UnPackElements (vtkTable *curTable, void *vLocalElements, vtkIdType numRows, vtkIdType numCols)
 
virtual int GetDataType ()
 Return the data type used to store cluster center coordinates. 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...
 
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)
 
vtkCommandGetCommand (unsigned long tag)
 
void RemoveObserver (vtkCommand *)
 
void RemoveObservers (unsigned long event, vtkCommand *)
 
void RemoveObservers (const char *event, vtkCommand *)
 
vtkTypeBool HasObserver (unsigned long event, vtkCommand *)
 
vtkTypeBool HasObserver (const char *event, vtkCommand *)
 
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)
 
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)
 
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)
 
int InvokeEvent (unsigned long event)
 
int InvokeEvent (const char *event)
 
- 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 PrintHeader (ostream &os, vtkIndent indent)
 
virtual void PrintTrailer (ostream &os, vtkIndent indent)
 
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...
 

Static Public Member Functions

static vtkKMeansDistanceFunctorCalculatorNew ()
 
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkKMeansDistanceFunctorCalculatorSafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkKMeansDistanceFunctor
static vtkKMeansDistanceFunctorNew ()
 
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkKMeansDistanceFunctorSafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkObject
static vtkObjectNew ()
 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 ()
 
static void GlobalWarningDisplayOff ()
 
static int GetGlobalWarningDisplay ()
 
- 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 vtkObjectBaseNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 vtkKMeansDistanceFunctorCalculator ()
 
 ~vtkKMeansDistanceFunctorCalculator () override
 
- Protected Member Functions inherited from vtkKMeansDistanceFunctor
 vtkKMeansDistanceFunctor ()
 
 ~vtkKMeansDistanceFunctor () 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 ()
 
- 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

char * DistanceExpression
 
int TupleSize
 
vtkFunctionParserFunctionParser
 
- Protected Attributes inherited from vtkKMeansDistanceFunctor
vtkVariantArrayEmptyTuple
 
vtkTableCenterUpdates
 
- Protected Attributes inherited from vtkObject
bool Debug
 
vtkTimeStamp MTime
 
vtkSubjectHelper * SubjectHelper
 
- Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t > ReferenceCount
 
vtkWeakPointerBase ** WeakPointers
 

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 33 of file vtkKMeansDistanceFunctorCalculator.h.

Member Typedef Documentation

◆ Superclass

Definition at line 37 of file vtkKMeansDistanceFunctorCalculator.h.

Constructor & Destructor Documentation

◆ vtkKMeansDistanceFunctorCalculator()

vtkKMeansDistanceFunctorCalculator::vtkKMeansDistanceFunctorCalculator ( )
protected

◆ ~vtkKMeansDistanceFunctorCalculator()

vtkKMeansDistanceFunctorCalculator::~vtkKMeansDistanceFunctorCalculator ( )
overrideprotected

Member Function Documentation

◆ New()

static vtkKMeansDistanceFunctorCalculator* vtkKMeansDistanceFunctorCalculator::New ( )
static

◆ IsTypeOf()

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

◆ IsA()

virtual vtkTypeBool 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.

◆ SafeDownCast()

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

◆ NewInstanceInternal()

virtual vtkObjectBase* vtkKMeansDistanceFunctorCalculator::NewInstanceInternal ( ) const
protectedvirtual

Reimplemented from vtkKMeansDistanceFunctor.

◆ NewInstance()

vtkKMeansDistanceFunctorCalculator* vtkKMeansDistanceFunctorCalculator::NewInstance ( ) const

◆ PrintSelf()

void vtkKMeansDistanceFunctorCalculator::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 vtkKMeansDistanceFunctor.

◆ operator()()

void vtkKMeansDistanceFunctorCalculator::operator() ( double ,
vtkVariantArray ,
vtkVariantArray  
)
overridevirtual

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

Reimplemented from vtkKMeansDistanceFunctor.

◆ SetDistanceExpression()

virtual void vtkKMeansDistanceFunctorCalculator::SetDistanceExpression ( const char *  )
virtual

Set/get the distance function expression.

◆ GetDistanceExpression()

virtual char* vtkKMeansDistanceFunctorCalculator::GetDistanceExpression ( )
virtual

◆ SetFunctionParser()

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.

◆ GetFunctionParser()

virtual vtkFunctionParser* vtkKMeansDistanceFunctorCalculator::GetFunctionParser ( )
virtual

Member Data Documentation

◆ DistanceExpression

char* vtkKMeansDistanceFunctorCalculator::DistanceExpression
protected

Definition at line 69 of file vtkKMeansDistanceFunctorCalculator.h.

◆ TupleSize

int vtkKMeansDistanceFunctorCalculator::TupleSize
protected

Definition at line 70 of file vtkKMeansDistanceFunctorCalculator.h.

◆ FunctionParser

vtkFunctionParser* vtkKMeansDistanceFunctorCalculator::FunctionParser
protected

Definition at line 71 of file vtkKMeansDistanceFunctorCalculator.h.


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