VTK  9.1.0
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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.
 
vtkKMeansDistanceFunctorCalculatorNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses.
 
void operator() (double &, vtkVariantArray *, vtkVariantArray *) override
 Compute the distance from one observation to another, returning the distance in the first argument.
 
virtual void SetDistanceExpression (const char *)
 Set/get the distance function expression.
 
virtual char * GetDistanceExpression ()
 Set/get the distance function expression.
 
virtual void SetFunctionParser (vtkFunctionParser *)
 Set/get the string containing an expression which evaluates to the distance metric used for k-means computation.
 
virtual vtkFunctionParserGetFunctionParser ()
 Set/get the string containing an expression which evaluates to the distance metric used for k-means computation.
 
- Public Member Functions inherited from vtkKMeansDistanceFunctor
virtual vtkTypeBool IsA (const char *type)
 Return 1 if this class is the same type of (or a subclass of) the named class.
 
vtkKMeansDistanceFunctorNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses.
 
virtual vtkVariantArrayGetEmptyTuple (vtkIdType dimension)
 Return an empty tuple.
 
virtual void operator() (double &, vtkVariantArray *, vtkVariantArray *)
 Compute the distance from one observation to another, returning the distance in the first argument.
 
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.
 
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.
 
virtual void * AllocateElementArray (vtkIdType size)
 Allocate an array large enough to hold size coordinates and return a void pointer to this array.
 
virtual void DeallocateElementArray (void *)
 Free an array allocated with AllocateElementArray.
 
virtual vtkAbstractArrayCreateCoordinateArray ()
 Return a vtkAbstractArray capable of holding cluster center coordinates.
 
virtual void PackElements (vtkTable *curTable, void *vElements)
 Pack the cluster center coordinates in vElements into columns of curTable.
 
virtual int GetDataType ()
 Return the data type used to store cluster center coordinates.
 
virtual void UnPackElements (vtkTable *curTable, vtkTable *newTable, void *vLocalElements, void *vGlobalElements, int np)
 Unpack the cluster center coordinates in vElements into columns of curTable.
 
virtual void UnPackElements (vtkTable *curTable, void *vLocalElements, vtkIdType numRows, vtkIdType numCols)
 Unpack the cluster center coordinates in vElements into columns of curTable.
 
- Public Member Functions inherited from vtkObject
 vtkBaseTypeMacro (vtkObject, vtkObjectBase)
 
virtual void DebugOn ()
 Turn debugging output on.
 
virtual void DebugOff ()
 Turn debugging output off.
 
bool GetDebug ()
 Get the value of the debug flag.
 
void SetDebug (bool debugFlag)
 Set the value of the debug flag.
 
virtual void Modified ()
 Update the modification time for this object.
 
virtual vtkMTimeType GetMTime ()
 Return this object's modified time.
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses.
 
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.
 
unsigned long AddObserver (const char *event, vtkCommand *, float priority=0.0f)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
vtkCommandGetCommand (unsigned long tag)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
void RemoveObserver (vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
void RemoveObservers (unsigned long event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
void RemoveObservers (const char *event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
vtkTypeBool HasObserver (unsigned long event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
vtkTypeBool HasObserver (const char *event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
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.
 
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.
 
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.
 
int InvokeEvent (unsigned long event, void *callData)
 This method invokes an event and return whether the event was aborted or not.
 
int InvokeEvent (const char *event, void *callData)
 This method invokes an event and return whether the event was aborted or not.
 
- Public Member Functions inherited from vtkObjectBase
const char * GetClassName () const
 Return the class name as a string.
 
virtual vtkTypeBool IsA (const char *name)
 Return 1 if this class is the same type of (or a subclass of) the named class.
 
virtual vtkIdType GetNumberOfGenerationsFromBase (const char *name)
 Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).
 
virtual void Delete ()
 Delete a VTK object.
 
virtual void FastDelete ()
 Delete a reference to this object.
 
void InitializeObjectBase ()
 
void Print (ostream &os)
 Print an object to an ostream.
 
virtual void Register (vtkObjectBase *o)
 Increase the reference count (mark as used by another object).
 
virtual void UnRegister (vtkObjectBase *o)
 Decrease the reference count (release by another object).
 
int GetReferenceCount ()
 Return the current reference count of this object.
 
void SetReferenceCount (int)
 Sets the reference count.
 
bool GetIsInMemkind () const
 A local state flag that remembers whether this object lives in the normal or extended memory space.
 
virtual void PrintHeader (ostream &os, vtkIndent indent)
 Methods invoked by print to print information about the object including superclasses.
 
virtual void PrintTrailer (ostream &os, vtkIndent indent)
 Methods invoked by print to print information about the object including superclasses.
 

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.
 
static void BreakOnError ()
 This method is called when vtkErrorMacro executes.
 
static void SetGlobalWarningDisplay (int val)
 This is a global flag that controls whether any debug, warning or error messages are displayed.
 
static void GlobalWarningDisplayOn ()
 This is a global flag that controls whether any debug, warning or error messages are displayed.
 
static void GlobalWarningDisplayOff ()
 This is a global flag that controls whether any debug, warning or error messages are displayed.
 
static int GetGlobalWarningDisplay ()
 This is a global flag that controls whether any debug, warning or error messages are displayed.
 
- 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.
 
static vtkIdType GetNumberOfGenerationsFromBaseType (const char *name)
 Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).
 
static vtkObjectBaseNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
 
static void SetMemkindDirectory (const char *directoryname)
 The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.
 
static bool GetUsingMemkind ()
 A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 vtkKMeansDistanceFunctorCalculator ()
 
 ~vtkKMeansDistanceFunctorCalculator () override
 
- Protected Member Functions inherited from vtkKMeansDistanceFunctor
virtual vtkObjectBaseNewInstanceInternal () const
 
 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.
 
void InternalReleaseFocus ()
 These methods allow a command to exclusively grab all events.
 
- Protected Member Functions inherited from vtkObjectBase
 vtkObjectBase ()
 
virtual ~vtkObjectBase ()
 
virtual void RegisterInternal (vtkObjectBase *, vtkTypeBool check)
 
virtual void UnRegisterInternal (vtkObjectBase *, vtkTypeBool check)
 
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
 

Additional Inherited Members

- Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction GetCurrentMallocFunction ()
 
static vtkReallocingFunction GetCurrentReallocFunction ()
 
static vtkFreeingFunction GetCurrentFreeFunction ()
 
static vtkFreeingFunction GetAlternateFreeFunction ()
 

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.

Definition at line 30 of file vtkKMeansDistanceFunctorCalculator.h.

Member Typedef Documentation

◆ Superclass

Definition at line 35 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

Set/get the distance function expression.

◆ 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

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.

Member Data Documentation

◆ DistanceExpression

char* vtkKMeansDistanceFunctorCalculator::DistanceExpression
protected

Definition at line 67 of file vtkKMeansDistanceFunctorCalculator.h.

◆ TupleSize

int vtkKMeansDistanceFunctorCalculator::TupleSize
protected

Definition at line 68 of file vtkKMeansDistanceFunctorCalculator.h.

◆ FunctionParser

vtkFunctionParser* vtkKMeansDistanceFunctorCalculator::FunctionParser
protected

Definition at line 69 of file vtkKMeansDistanceFunctorCalculator.h.


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