vtkPBGLRMATGraphSource Class Reference

#include <vtkPBGLRMATGraphSource.h>

Inheritance diagram for vtkPBGLRMATGraphSource:

[legend]

Collaboration diagram for vtkPBGLRMATGraphSource:

[legend]

List of all members.

Detailed Description

a distributed graph with random edges built accorting to the recursive matrix (R-MAT) model.

Generates a directed distributed graph with a specified number of vertices (N=2^X) and a set of probabilities A, B, C, and D, using the recursive matrix (R-MAT) method of Chakrabarti, Zhan, and Faloutsos. Edges are generated by randomly selecting an element within the adjacency matrix, then adding the corresponding edge. The element in the adjacency matrix is selected by placing set of grids over the adjacency list. The topmost grid has four quadrants, and the probability of creating an edge within that quadrant is specified by A, B, C, or D, corresponding to the top-left, top-right, bottom-left, and bottom-right quadrants in the grid, respectively:

+-+-+ |A|B| +-+-+ |C|D| +-+-+

Naturally, A+B+C+D must equal 1. Once a quadrant has been selected, the quadrant itself is subdivided into another A-B-C-D grid and the same process is applied repeatedly until the grid itself matches the adjacency matrix and a specific edge is selected.

Typically, A >= B, A >= C, and A >= D. A and D are viewed as two separate communities, while B and C provide interconnections between those two communities. The more skewed the probabilities between the communities (A >= D), the more unbalanced the resulting degree distributions will be. With no skew (A=B=C=D=0.25), this generator produces graphs similar to the random graphs provided by vtkPRandomGraphSource. Greater skew values tend to produce graphs with a power-law degree distribution, which mimics the behavior of many real-world graphs based on social networks.

Tests:: vtkPBGLRMATGraphSource (Tests)

Definition at line 75 of file vtkPBGLRMATGraphSource.h.


Public Types
typedef vtkGraphAlgorithm	Superclass
Public Member Functions
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)
virtual void	SetNumberOfVertices (vtkIdType value)
void	SetProbabilities (double A, double B, double C, double D)
void	GetProbabilities (double A, double B, double C, double D)

virtual vtkIdType	GetNumberOfVertices ()

virtual vtkIdType	GetNumberOfEdges ()
virtual void	SetNumberOfEdges (vtkIdType)

virtual void	SetIncludeEdgeWeights (bool)
virtual bool	GetIncludeEdgeWeights ()
virtual void	IncludeEdgeWeightsOn ()
virtual void	IncludeEdgeWeightsOff ()

virtual void	SetEdgeWeightArrayName (const char *)
virtual char *	GetEdgeWeightArrayName ()

virtual void	SetAllowSelfLoops (bool)
virtual bool	GetAllowSelfLoops ()
virtual void	AllowSelfLoopsOn ()
virtual void	AllowSelfLoopsOff ()

virtual void	SetGeneratePedigreeIds (bool)
virtual bool	GetGeneratePedigreeIds ()
virtual void	GeneratePedigreeIdsOn ()
virtual void	GeneratePedigreeIdsOff ()

virtual void	SetVertexPedigreeIdArrayName (const char *)
virtual char *	GetVertexPedigreeIdArrayName ()

virtual void	SetEdgePedigreeIdArrayName (const char *)
virtual char *	GetEdgePedigreeIdArrayName ()

virtual void	SetSeed (int)
virtual int	GetSeed ()
Static Public Member Functions
static vtkPBGLRMATGraphSource *	New ()
static int	IsTypeOf (const char *type)
static vtkPBGLRMATGraphSource *	SafeDownCast (vtkObject *o)
Protected Member Functions
	vtkPBGLRMATGraphSource ()
	~vtkPBGLRMATGraphSource ()
virtual int	RequestData (vtkInformation , vtkInformationVector , vtkInformationVector )

virtual int	RequestDataObject (vtkInformation , vtkInformationVector inputVector, vtkInformationVector outputVector)
Protected Attributes
vtkIdType	NumberOfVertices
vtkIdType	NumberOfEdges
double	A
double	B
double	C
double	D
bool	IncludeEdgeWeights
bool	AllowSelfLoops
bool	GeneratePedigreeIds
int	Seed
char *	EdgeWeightArrayName
char *	VertexPedigreeIdArrayName
char *	EdgePedigreeIdArrayName

Member Typedef Documentation

typedef vtkGraphAlgorithm vtkPBGLRMATGraphSource::Superclass

Reimplemented from vtkGraphAlgorithm.

Definition at line 79 of file vtkPBGLRMATGraphSource.h.

Constructor & Destructor Documentation

vtkPBGLRMATGraphSource::vtkPBGLRMATGraphSource ( ) [protected]

vtkPBGLRMATGraphSource::~vtkPBGLRMATGraphSource ( ) [protected]

Member Function Documentation

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

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

Reimplemented from vtkGraphAlgorithm.

virtual const char* vtkPBGLRMATGraphSource::GetClassName ( ) [virtual]

Reimplemented from vtkGraphAlgorithm.

static int vtkPBGLRMATGraphSource::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 vtkGraphAlgorithm.

virtual int vtkPBGLRMATGraphSource::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 vtkGraphAlgorithm.

static vtkPBGLRMATGraphSource* vtkPBGLRMATGraphSource::SafeDownCast ( vtkObject * o ) [static]

Reimplemented from vtkGraphAlgorithm.

void vtkPBGLRMATGraphSource::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 vtkGraphAlgorithm.

virtual vtkIdType vtkPBGLRMATGraphSource::GetNumberOfVertices ( ) [virtual]

The number of vertices in the graph. This value will always be a power of two.

virtual void vtkPBGLRMATGraphSource::SetNumberOfVertices ( vtkIdType value ) [virtual]

Sets the number of vertices in the graph, which will be rounded to the nearest power of two.

virtual vtkIdType vtkPBGLRMATGraphSource::GetNumberOfEdges ( ) [virtual]

Creates a graph with the specified number of edges. Duplicate (parallel) edges are allowed.

virtual void vtkPBGLRMATGraphSource::SetNumberOfEdges ( vtkIdType ) [virtual]

Creates a graph with the specified number of edges. Duplicate (parallel) edges are allowed.

void vtkPBGLRMATGraphSource::SetProbabilities	(	double	A,
		double	B,
		double	C,
		double	D
	)

Set the quadrant probabilities A, B, C, D. Requires that A+B+C+D=1.

void vtkPBGLRMATGraphSource::GetProbabilities	(	double *	A,
		double *	B,
		double *	C,
		double *	D
	)

Retrieves the quadrant probabilities.

virtual void vtkPBGLRMATGraphSource::SetIncludeEdgeWeights ( bool ) [virtual]

When set, includes edge weights in an array named "edge_weights". Defaults to off. Weights are random between 0 and 1.

virtual bool vtkPBGLRMATGraphSource::GetIncludeEdgeWeights ( ) [virtual]

When set, includes edge weights in an array named "edge_weights". Defaults to off. Weights are random between 0 and 1.

virtual void vtkPBGLRMATGraphSource::IncludeEdgeWeightsOn ( ) [virtual]

When set, includes edge weights in an array named "edge_weights". Defaults to off. Weights are random between 0 and 1.

virtual void vtkPBGLRMATGraphSource::IncludeEdgeWeightsOff ( ) [virtual]

When set, includes edge weights in an array named "edge_weights". Defaults to off. Weights are random between 0 and 1.

virtual void vtkPBGLRMATGraphSource::SetEdgeWeightArrayName ( const char * ) [virtual]

The name of the edge weight array. Default "edge weight".

virtual char* vtkPBGLRMATGraphSource::GetEdgeWeightArrayName ( ) [virtual]

The name of the edge weight array. Default "edge weight".

virtual void vtkPBGLRMATGraphSource::SetAllowSelfLoops ( bool ) [virtual]

If this flag is set to true, edges where the source and target vertex are the same can be generated. The default is to forbid such loops.

virtual bool vtkPBGLRMATGraphSource::GetAllowSelfLoops ( ) [virtual]

If this flag is set to true, edges where the source and target vertex are the same can be generated. The default is to forbid such loops.

virtual void vtkPBGLRMATGraphSource::AllowSelfLoopsOn ( ) [virtual]

If this flag is set to true, edges where the source and target vertex are the same can be generated. The default is to forbid such loops.

virtual void vtkPBGLRMATGraphSource::AllowSelfLoopsOff ( ) [virtual]

If this flag is set to true, edges where the source and target vertex are the same can be generated. The default is to forbid such loops.

virtual void vtkPBGLRMATGraphSource::SetGeneratePedigreeIds ( bool ) [virtual]

Add pedigree ids to vertex and edge data.

virtual bool vtkPBGLRMATGraphSource::GetGeneratePedigreeIds ( ) [virtual]

Add pedigree ids to vertex and edge data.

virtual void vtkPBGLRMATGraphSource::GeneratePedigreeIdsOn ( ) [virtual]

Add pedigree ids to vertex and edge data.

virtual void vtkPBGLRMATGraphSource::GeneratePedigreeIdsOff ( ) [virtual]

Add pedigree ids to vertex and edge data.

virtual void vtkPBGLRMATGraphSource::SetVertexPedigreeIdArrayName ( const char * ) [virtual]

The name of the vertex pedigree id array. Default "vertex id".

virtual char* vtkPBGLRMATGraphSource::GetVertexPedigreeIdArrayName ( ) [virtual]

The name of the vertex pedigree id array. Default "vertex id".

virtual void vtkPBGLRMATGraphSource::SetEdgePedigreeIdArrayName ( const char * ) [virtual]

The name of the edge pedigree id array. Default "edge id".

virtual char* vtkPBGLRMATGraphSource::GetEdgePedigreeIdArrayName ( ) [virtual]

The name of the edge pedigree id array. Default "edge id".

virtual void vtkPBGLRMATGraphSource::SetSeed ( int ) [virtual]

Control the seed used for pseudo-random-number generation. This ensures that vtkPBGLRMATGraphSource can produce repeatable results. The seed values provided for each process should be different,

virtual int vtkPBGLRMATGraphSource::GetSeed ( ) [virtual]

Control the seed used for pseudo-random-number generation. This ensures that vtkPBGLRMATGraphSource can produce repeatable results. The seed values provided for each process should be different,

virtual int vtkPBGLRMATGraphSource::RequestData	(	vtkInformation *	request,
		vtkInformationVector **	inputVector,
		vtkInformationVector *	outputVector
	)			`[protected, virtual]`

This is called by the superclass. This is the method you should override.

Reimplemented from vtkGraphAlgorithm.

virtual int vtkPBGLRMATGraphSource::RequestDataObject	(	vtkInformation *	,
		vtkInformationVector **	inputVector,
		vtkInformationVector *	outputVector
	)			`[protected, virtual]`