Detailed Description

This transform uses buckets to convert continuous data into discrete data. It is common to use GFilter to combine this with your favorite modeler (which only supports discrete values) to create a modeler that can also support continuous values as well.

#include <GTransform.h>

Inheritance diagram for GClasses::GDiscretize:

Public Member Functions
	GDiscretize (size_t buckets=INVALID_INDEX)
	if buckets is less than 0, then it will use the floor of the square root of the number of rows in the data More...

	GDiscretize (const GDomNode *pNode)
	Load from a DOM. More...

virtual	~GDiscretize ()

virtual GDomNode *	serialize (GDom *pDoc) const
	Marshal this object into a DOM, which can then be converted to a variety of serial formats. More...

virtual void	transform (const GVec &in, GVec &out)
	See the comment for GIncrementalTransform::transform. More...

virtual void	untransform (const GVec &in, GVec &out)
	See the comment for GIncrementalTransform::untransform. More...

virtual void	untransformToDistribution (const GVec &in, GPrediction *pOut)
	See the comment for GIncrementalTransform::untransformToDistribution. More...

Public Member Functions inherited from GClasses::GIncrementalTransform
	GIncrementalTransform ()

	GIncrementalTransform (const GDomNode *pNode)

virtual	~GIncrementalTransform ()

const GRelation &	after () const
	Returns a relation object describing the data after it is transformed. More...

const GRelation &	before () const
	Returns a relation object describing the data before it is transformed. More...

GVec &	innerBuf ()
	Returns a buffer of sufficient size to store an inner (transformed) vector. The caller should not to delete the buffer. The same buffer will be returned each time. More...

virtual GMatrix *	reduce (const GMatrix &in)
	This calls train, then calls transformBatch, and returns the result. More...

void	setAfter (GRelation *pRel)
	Sets the after relation. Takes ownership of pRel. More...

void	setBefore (GRelation *pRel)
	Sets the before relation. Takes ownership of pRel. More...

void	train (const GMatrix &data)
	Trains the transform on the data in pData. (This method may be a no-op for transformations that always behave in the same manner.) More...

void	train (const GRelation &pRelation)
	"Trains" the transform without any data. More...

virtual GMatrix *	transformBatch (const GMatrix &in)
	This assumes that train has already been called, and transforms all the rows in in returning the resulting matrix. The caller is responsible for deleting the new matrix. More...

virtual std::unique_ptr< GMatrix >	untransformBatch (const GMatrix &in)
	This assumes train was previously called, and untransforms all the rows in pIn and returns the results. More...

Public Member Functions inherited from GClasses::GTransform
	GTransform ()

	GTransform (const GDomNode *pNode)

virtual	~GTransform ()

Protected Member Functions
virtual GRelation *	trainInner (const GMatrix &data)
	See the comment for GIncrementalTransform::train. More...

virtual GRelation *	trainInner (const GRelation &relation)
	Throws an exception (because this transform cannot be trained without data) More...

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

Protected Attributes
size_t	m_bucketsIn

size_t	m_bucketsOut

GVec	m_mins

GVec	m_ranges

Additional Inherited Members
Static Public Member Functions inherited from GClasses::GIncrementalTransform
static void	test ()
	Performs unit tests for this class. Throws an exception if there is a failure. More...