LLTSA Class Reference

#include <lltsa.h>

Inheritance diagram for LLTSA:

Collaboration diagram for LLTSA:

Public Member Functions
void	reduceDimensionality ()
	Reduce dimensionality. More...
Public Member Functions inherited from LTSA
void	setSpecificParameters (int k=12)
	Set specific parameters. More...
Public Member Functions inherited from DimRedAlgorithm
	DimRedAlgorithm ()
	Empty constructor. More...
void	setInputData (Matrix2D< double > &X)
	Set input data. More...
void	setOutputDimensionality (size_t outputDim)
	Set output dimensionality. More...
const Matrix2D< double > &	getReducedData ()
	Get reduced data. More...

Public Attributes
Matrix2D< double >	A
Public Attributes inherited from LTSA
int	k
Public Attributes inherited from DimRedAlgorithm
Matrix2D< double > *	X
	Pointer to input data. More...
size_t	outputDim
	Output dim. More...
Matrix2D< double >	Y
	Output data. More...
DimRedDistance2	distance
	Distance function. More...
FileName	fnMapping
	Save mapping. More...

Additional Inherited Members
Protected Member Functions inherited from LTSA
void	computeAlignmentMatrix (Matrix2D< double > &B)
	Common part. More...

Detailed Description

Class for making a LLTSA dimensionality reduction

Definition at line 37 of file lltsa.h.

Member Function Documentation

reduceDimensionality()

void LLTSA::reduceDimensionality ( )

virtual

Reduce dimensionality.

Reimplemented from LTSA.

Definition at line 35 of file lltsa.cpp.

{
    Matrix2D<double> B, XtBX, XtX;
    computeAlignmentMatrix(B);

    Matrix1D<double> DEigs;
    matrixOperation_AtB(*X, B, XtBX);
    matrixOperation_AtA(*X, XtX);
    XtBX = XtBX * (*X);
    generalizedEigs(XtBX, XtX, DEigs, A);
    eraseLastNColumns(A, MAT_XSIZE(A) - outputDim);
    Y = *X * A;
    if (fnMapping!="")
        A.write(fnMapping);
}

Member Data Documentation

A

Matrix2D<double> LLTSA::A

Definition at line 41 of file lltsa.h.

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

• xmipp/libraries/dimred/lltsa.h
• xmipp/libraries/dimred/lltsa.cpp