bpp-core3
3.0.0
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This class allows to perform a principal component analysis. More...
#include <Bpp/Numeric/Stat/Mva/PrincipalComponentAnalysis.h>
Public Member Functions | |
PrincipalComponentAnalysis (const Matrix< double > &data, unsigned int nbAxes, const std::vector< double > &rowW, const std::vector< double > &colW, bool centered=true, bool scaled=true, double tol=0.0000001, bool verbose=true) | |
Build a new PrincipalComponentAnalysis object. More... | |
PrincipalComponentAnalysis (const Matrix< double > &data, unsigned int nbAxes, bool centered=true, bool scaled=true, double tol=0.0000001, bool verbose=true) | |
Build a new PrincipalComponentAnalysis object and specify default row and column weights. More... | |
virtual | ~PrincipalComponentAnalysis () |
PrincipalComponentAnalysis * | clone () const |
Create a copy of this object and send a pointer to it. More... | |
const std::vector< double > & | getColumnMeans () const |
const std::vector< double > & | getColumnSd () const |
void | setData (const Matrix< double > &matrix, const std::vector< double > &rowWeights, const std::vector< double > &colWeights, unsigned int nbAxes, double tol=0.0000001, bool verbose=true) |
Set the data and perform computations. More... | |
std::vector< double > | computeVariancePercentagePerAxis () |
size_t | getNbOfKeptAxes () const |
const std::vector< double > | getRowWeights () const |
const std::vector< double > | getColumnWeights () const |
const std::vector< double > & | getEigenValues () const |
const RowMatrix< double > & | getRowCoordinates () const |
const RowMatrix< double > & | getColCoordinates () const |
const RowMatrix< double > & | getPrincipalAxes () const |
const RowMatrix< double > & | getPrincipalComponents () const |
Static Public Member Functions | |
static void | center (Matrix< double > &matrix, const std::vector< double > &rowW) |
This function allows to center an input matrix from its column means. More... | |
static void | scale (Matrix< double > &matrix, const std::vector< double > &rowW) |
This function allows to center an input matrix from its column means. More... | |
Private Member Functions | |
void | check_ (const Matrix< double > &matrix, const std::vector< double > &rowWeights, const std::vector< double > &colWeights, unsigned int nbAxes) |
void | compute_ (const Matrix< double > &matrix, double tol, bool verbose) |
Private Attributes | |
std::vector< double > | columnMeans_ |
std::vector< double > | columnSd_ |
std::vector< double > | rowWeights_ |
std::vector< double > | colWeights_ |
size_t | nbAxes_ |
std::vector< double > | eigenValues_ |
RowMatrix< double > | eigenVectors_ |
RowMatrix< double > | rowCoord_ |
RowMatrix< double > | colCoord_ |
RowMatrix< double > | ppalAxes_ |
RowMatrix< double > | ppalComponents_ |
This class allows to perform a principal component analysis.
Two constructors are available. The first one allows the user to specify the row and column weights. The second one specify default weights: uniform weights unit weights are created for rows and columns respectively.
The code of this class is deeply inspired from the R code of the dudi.pca function available in the ade4 package.
Definition at line 58 of file PrincipalComponentAnalysis.h.
PrincipalComponentAnalysis::PrincipalComponentAnalysis | ( | const Matrix< double > & | data, |
unsigned int | nbAxes, | ||
const std::vector< double > & | rowW, | ||
const std::vector< double > & | colW, | ||
bool | centered = true , |
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bool | scaled = true , |
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double | tol = 0.0000001 , |
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bool | verbose = true |
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Build a new PrincipalComponentAnalysis object.
data | The input data (a RowMatrix) to analyse. |
nbAxes | The number of kept axes during the analysis. |
rowW | A vector of values specifying the weights of rows. |
colW | A vector of values specifying the weights of columns. |
centered | If true the input matrix is centered according to the column means. |
scaled | If true the input matrix is normalized according to the standard deviations of columns. |
tol | Tolerance threshold for null eigenvalues (a value less than tol times the first one is considered as null) |
verbose | Should warnings be dispayed. |
Exception | if an error occured. |
Definition at line 51 of file PrincipalComponentAnalysis.cpp.
References center(), scale(), and bpp::DualityDiagram::setData().
Referenced by clone().
PrincipalComponentAnalysis::PrincipalComponentAnalysis | ( | const Matrix< double > & | data, |
unsigned int | nbAxes, | ||
bool | centered = true , |
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bool | scaled = true , |
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double | tol = 0.0000001 , |
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bool | verbose = true |
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Build a new PrincipalComponentAnalysis object and specify default row and column weights.
data | The input data (a RowMatrix) to analyse. |
nbAxes | The number of kept axes during the analysis. |
centered | If true the input matrix is centered according to the column means. |
scaled | If true the input matrix is normalized according to the standard deviations of columns. |
tol | Tolerance threshold for null eigenvalues (a value less than tol times the first one is considered as null) |
verbose | Should warnings be dispayed. |
Exception | if an error occured. |
Definition at line 83 of file PrincipalComponentAnalysis.cpp.
References center(), bpp::VectorTools::fill(), bpp::Matrix< Scalar >::getNumberOfColumns(), bpp::Matrix< Scalar >::getNumberOfRows(), scale(), and bpp::DualityDiagram::setData().
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inlinevirtual |
Definition at line 108 of file PrincipalComponentAnalysis.h.
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static |
This function allows to center an input matrix from its column means.
matrix | The input data (a Matrix) to center. |
rowW | A vector with row weights. |
Definition at line 121 of file PrincipalComponentAnalysis.cpp.
References bpp::Matrix< Scalar >::getNumberOfColumns(), bpp::Matrix< Scalar >::getNumberOfRows(), and bpp::VectorTools::sum().
Referenced by PrincipalComponentAnalysis().
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privateinherited |
Definition at line 71 of file DualityDiagram.cpp.
References bpp::Matrix< Scalar >::getNumberOfColumns(), and bpp::Matrix< Scalar >::getNumberOfRows().
Referenced by bpp::DualityDiagram::DualityDiagram(), and bpp::DualityDiagram::setData().
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inlinevirtual |
Create a copy of this object and send a pointer to it.
Reimplemented from bpp::DualityDiagram.
Definition at line 110 of file PrincipalComponentAnalysis.h.
References PrincipalComponentAnalysis().
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privateinherited |
Definition at line 115 of file DualityDiagram.cpp.
References bpp::DualityDiagram::colCoord_, bpp::DualityDiagram::colWeights_, bpp::ApplicationTools::displayWarning(), bpp::DualityDiagram::eigenValues_, bpp::DualityDiagram::eigenVectors_, bpp::RowMatrix< Scalar >::getNumberOfColumns(), bpp::Matrix< Scalar >::getNumberOfColumns(), bpp::RowMatrix< Scalar >::getNumberOfRows(), bpp::Matrix< Scalar >::getNumberOfRows(), bpp::EigenValue< Real >::getRealEigenValues(), bpp::EigenValue< Real >::getV(), bpp::MatrixTools::hadamardMult(), bpp::EigenValue< Real >::isSymmetric(), bpp::MatrixTools::mult(), bpp::DualityDiagram::nbAxes_, bpp::DualityDiagram::ppalAxes_, bpp::DualityDiagram::ppalComponents_, bpp::RowMatrix< Scalar >::resize(), bpp::DualityDiagram::rowCoord_, bpp::DualityDiagram::rowWeights_, and bpp::MatrixTools::transpose().
Referenced by bpp::DualityDiagram::DualityDiagram(), and bpp::DualityDiagram::setData().
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inherited |
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inlineinherited |
Definition at line 146 of file DualityDiagram.h.
References bpp::DualityDiagram::colCoord_.
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inline |
Definition at line 130 of file PrincipalComponentAnalysis.h.
References columnMeans_.
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inline |
Definition at line 131 of file PrincipalComponentAnalysis.h.
References columnSd_.
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inlineinherited |
Definition at line 143 of file DualityDiagram.h.
References bpp::DualityDiagram::colWeights_.
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inlineinherited |
Definition at line 144 of file DualityDiagram.h.
References bpp::DualityDiagram::eigenValues_.
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inlineinherited |
Definition at line 141 of file DualityDiagram.h.
References bpp::DualityDiagram::nbAxes_.
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inlineinherited |
Definition at line 147 of file DualityDiagram.h.
References bpp::DualityDiagram::ppalAxes_.
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inlineinherited |
Definition at line 148 of file DualityDiagram.h.
References bpp::DualityDiagram::ppalComponents_.
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inlineinherited |
Definition at line 145 of file DualityDiagram.h.
References bpp::DualityDiagram::rowCoord_.
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inlineinherited |
Definition at line 142 of file DualityDiagram.h.
References bpp::DualityDiagram::rowWeights_.
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static |
This function allows to center an input matrix from its column means.
matrix | The input data (a Matrix) to center. |
rowW | A vector with row weights. |
Definition at line 152 of file PrincipalComponentAnalysis.cpp.
References bpp::Matrix< Scalar >::getNumberOfColumns(), bpp::Matrix< Scalar >::getNumberOfRows(), and bpp::VectorTools::sum().
Referenced by PrincipalComponentAnalysis().
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inherited |
Set the data and perform computations.
matrix | The input data to analyse. |
rowWeights | A vector of values specifying the weights of rows. |
colWeights | A vector of values specifying the weights of columns. |
nbAxes | The number of kept axes during the analysis. |
tol | Tolerance threshold for null eigenvalues (a value less than tol times the first one is considered as null) |
verbose | Should warnings be dispayed. |
Exception | if an error occured. |
Definition at line 101 of file DualityDiagram.cpp.
References bpp::DualityDiagram::check_(), bpp::DualityDiagram::colWeights_, bpp::DualityDiagram::compute_(), bpp::DualityDiagram::nbAxes_, and bpp::DualityDiagram::rowWeights_.
Referenced by bpp::CorrespondenceAnalysis::CorrespondenceAnalysis(), and PrincipalComponentAnalysis().
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privateinherited |
Definition at line 68 of file DualityDiagram.h.
Referenced by bpp::DualityDiagram::compute_(), and bpp::DualityDiagram::getColCoordinates().
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private |
Definition at line 62 of file PrincipalComponentAnalysis.h.
Referenced by getColumnMeans().
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private |
Definition at line 63 of file PrincipalComponentAnalysis.h.
Referenced by getColumnSd().
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privateinherited |
Definition at line 63 of file DualityDiagram.h.
Referenced by bpp::DualityDiagram::compute_(), bpp::DualityDiagram::getColumnWeights(), and bpp::DualityDiagram::setData().
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privateinherited |
Definition at line 65 of file DualityDiagram.h.
Referenced by bpp::DualityDiagram::compute_(), and bpp::DualityDiagram::getEigenValues().
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privateinherited |
Definition at line 66 of file DualityDiagram.h.
Referenced by bpp::DualityDiagram::compute_().
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privateinherited |
Definition at line 64 of file DualityDiagram.h.
Referenced by bpp::DualityDiagram::compute_(), bpp::DualityDiagram::getNbOfKeptAxes(), and bpp::DualityDiagram::setData().
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privateinherited |
Definition at line 69 of file DualityDiagram.h.
Referenced by bpp::DualityDiagram::compute_(), and bpp::DualityDiagram::getPrincipalAxes().
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privateinherited |
Definition at line 70 of file DualityDiagram.h.
Referenced by bpp::DualityDiagram::compute_(), and bpp::DualityDiagram::getPrincipalComponents().
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privateinherited |
Definition at line 67 of file DualityDiagram.h.
Referenced by bpp::DualityDiagram::compute_(), and bpp::DualityDiagram::getRowCoordinates().
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privateinherited |
Definition at line 62 of file DualityDiagram.h.
Referenced by bpp::DualityDiagram::compute_(), bpp::DualityDiagram::getRowWeights(), and bpp::DualityDiagram::setData().