DatasetScaler Class Reference

A static class providing utilities for scaling the query and the reference datasets. More...

List of all members.

Static Public Member Functions
static void	ScaleDataByMinMax (Matrix &qset, Matrix &rset, bool queries_equal_references)
	Scale the given query and the reference datasets to fit in the unit hypercube $[0,1]^D$ where $D$ is the common dimensionality of the two datasets.
static void	StandardizeData (Matrix &qset, Matrix &rset, bool queries_equal_references)
	Standardize the given query and the reference datasets in each dimension to have zero mean and at most unit variance.
static void	TranslateDataByMin (Matrix &qset, Matrix &rset, bool queries_equal_references)
	Scale the given query and the reference datasets to lie in the positive quadrant.

---

Detailed Description

A static class providing utilities for scaling the query and the reference datasets.

Example use:

    DatasetScaler::ScaleDataByMinMax(qset, rset, queries_equal_references);

Definition at line 55 of file dataset_scaler.h.

---

Member Function Documentation

static void DatasetScaler::ScaleDataByMinMax	(	Matrix &	qset,
		Matrix &	rset,
		bool	queries_equal_references
	)			[inline, static]

Scale the given query and the reference datasets to fit in the unit hypercube $[0,1]^D$ where $D$ is the common dimensionality of the two datasets.

Parameters:

	qset	The column-oriented query set.
	rset	The column-oriented reference set.
	queries_equal_references	The boolean flag that tells whether the queries equal the references.

Definition at line 117 of file dataset_scaler.h.

References DHrectBound< t_pow >::get(), DRange::hi, DHrectBound< t_pow >::Init(), and DRange::lo.

Referenced by main().

static void DatasetScaler::StandardizeData	(	Matrix &	qset,
		Matrix &	rset,
		bool	queries_equal_references
	)			[inline, static]

Standardize the given query and the reference datasets in each dimension to have zero mean and at most unit variance.

Assumes that the query and the reference together contain more than one instance.

Parameters:

	qset	The column-oriented query set.
	rset	The column-oriented reference set.
	queries_equal_references	The boolean flag that tells whether the queries equal the references.

Definition at line 180 of file dataset_scaler.h.

References linalg__private::AddTo(), GenVector< T >::Init(), GenVector< T >::ptr(), linalg__private::Scale(), GenVector< T >::SetZero(), and math::Sqr().

Referenced by main().

static void DatasetScaler::TranslateDataByMin	(	Matrix &	qset,
		Matrix &	rset,
		bool	queries_equal_references
	)			[inline, static]

Scale the given query and the reference datasets to lie in the positive quadrant.

Parameters:

	qset	The column-oriented query set.
	rset	The column-oriented reference set.
	queries_equal_references	The boolean flag that tells whether the queries equal the references.

Definition at line 67 of file dataset_scaler.h.

References DHrectBound< t_pow >::get(), DRange::hi, DHrectBound< t_pow >::Init(), and DRange::lo.

---

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

• mlpack/kde/dataset_scaler.h