GClasses::GIsomap Class Reference

Detailed Description

Isomap is a manifold learning algorithm that uses the Floyd-Warshall algorithm to compute an estimate of the geodesic distance between every pair of points using local neighborhoods, and then uses classic multidimensional scaling to compute a low-dimensional projection.

#include <GManifold.h>

Inheritance diagram for GClasses::GIsomap:

Public Member Functions
	GIsomap (size_t neighborCount, size_t targetDims, GRand *pRand)
	GIsomap (GDomNode *pNode)
virtual	~GIsomap ()
void	dropDisconnectedPoints ()
	If there are any points that are not connected to the main group, just drop them instead of throwing an exception. (Note that this may cause the results to contain a different number of rows than the input.) More...
virtual GMatrix *	reduce (const GMatrix &in)
	Performs NLDR. More...
GDomNode *	serialize (GDom *pDoc) const
	Serializes this object. More...
void	setNeighborFinder (GNeighborFinder *pNF)
	Specifies to use the neighborhoods determined by the specified neighbor-finder instead of the nearest Euclidean-distance neighbors to establish local linearity. If this method is called, it will also use the number of neighbors and the data associated with pNF, and ignore the number of neighbors specified to the constructor, and ignore the data passed to the "transform" method. More...
Public Member Functions inherited from GClasses::GTransform
	GTransform ()
	GTransform (const GDomNode *pNode)
virtual	~GTransform ()

Protected Attributes
bool	m_dropDisconnectedPoints
size_t	m_neighborCount
GNeighborFinder *	m_pNF
GRand *	m_pRand
size_t	m_targetDims

Additional Inherited Members
Protected Member Functions inherited from GClasses::GTransform
virtual GDomNode *	baseDomNode (GDom *pDoc, const char *szClassName) const
	Child classes should use this in their implementation of serialize. More...

Constructor & Destructor Documentation

GClasses::GIsomap::GIsomap	(	size_t	neighborCount,
		size_t	targetDims,
		GRand *	pRand
	)

GClasses::GIsomap::GIsomap

(

GDomNode *

pNode

)

virtual GClasses::GIsomap::~GIsomap ( )

virtual

Member Function Documentation

void GClasses::GIsomap::dropDisconnectedPoints ( )

inline

If there are any points that are not connected to the main group, just drop them instead of throwing an exception. (Note that this may cause the results to contain a different number of rows than the input.)

virtual GMatrix* GClasses::GIsomap::reduce ( const GMatrix &  in )

virtual

Performs NLDR.

Implements GClasses::GTransform.

GDomNode* GClasses::GIsomap::serialize

(

GDom *

pDoc

)

const

Serializes this object.

void GClasses::GIsomap::setNeighborFinder

(

GNeighborFinder *

pNF

)

Specifies to use the neighborhoods determined by the specified neighbor-finder instead of the nearest Euclidean-distance neighbors to establish local linearity. If this method is called, it will also use the number of neighbors and the data associated with pNF, and ignore the number of neighbors specified to the constructor, and ignore the data passed to the "transform" method.

Member Data Documentation

bool GClasses::GIsomap::m_dropDisconnectedPoints

protected

size_t GClasses::GIsomap::m_neighborCount

protected

GNeighborFinder* GClasses::GIsomap::m_pNF

protected

GRand* GClasses::GIsomap::m_pRand

protected

size_t GClasses::GIsomap::m_targetDims

protected