Cosan::PolynomialFeatures< NumericType > Class Template Reference

#include <polynomialfeatures.h>

Inheritance diagram for Cosan::PolynomialFeatures< NumericType >:

Public Member Functions
	PolynomialFeatures ()=delete
	PolynomialFeatures (CosanRawData< NumericType > &RD, std::vector< std::pair< gsl::index, NumericType >> um, bool add_back=false)
void	SetInteractionFeatures (CosanRawData< NumericType > &RD, std::pair< gsl::index, gsl::index > pair, bool add_back=false)
decltype(auto)	GetPolynomialFeatures ()
decltype(auto)	GetInteractionFeatures ()
void	UpdatePolynomialFeatures (CosanMatrix< NumericType > inputX)
Public Member Functions inherited from Cosan::Preprocessor< NumericType >
	Preprocessor ()
virtual	~Preprocessor ()=default
virtual void	fit (const CosanMatrix< NumericType > &X)
virtual CosanMatrix< NumericType >	transform (const CosanMatrix< NumericType > &X)
Public Member Functions inherited from Cosan::CosanBO
	CosanBO ()
	Default constructor. More...
virtual const std::string	GetName () const
	Get the name of the objects. More...

Private Attributes
CosanMatrix< NumericType >	__polynomialFeatures
CosanMatrix< NumericType >	__interactionFeatures

Detailed Description

template<Numeric NumericType>
class Cosan::PolynomialFeatures< NumericType >

Generate polynomial and interaction features. Generate a new feature matrix consisting of all polynomial combinations of the features with degree less than or equal to the specified degree.

Definition at line 14 of file polynomialfeatures.h.

Constructor & Destructor Documentation

PolynomialFeatures() [1/2]

template<Numeric NumericType>

Cosan::PolynomialFeatures< NumericType >::PolynomialFeatures ( )

delete

PolynomialFeatures() [2/2]

template<Numeric NumericType>

Cosan::PolynomialFeatures< NumericType >::PolynomialFeatures ( CosanRawData< NumericType > &  RD, std::vector< std::pair< gsl::index, NumericType >>  um, bool  add_back = false  )

inline

Definition at line 17 of file polynomialfeatures.h.

                                                                                                                                : Preprocessor<NumericType>(){
                fmt::print("*********************************\n");
                fmt::print("Begin to generating polynomial features!!\n");
 
                decltype(auto) X = RD.GetInput();
                __polynomialFeatures.conservativeResize(X.rows(),um.size());
//                std::cout<<um.size()<<std::endl;
//                X.conservativeResize(X.rows(),X.cols()+um.size());
                gsl::index i = 0;
                for (const auto & each : um) {
                    if (each.second>=3){
                        fmt::print("Your choice of power {:f} may be too big. High potential of overflow!",each.second);
                    }
                    __polynomialFeatures.col(i) = X.col(each.first).array().pow(each.second);
                    fmt::print("Generating power {:f} of Column {:d}!\n",each.second,each.first);
                    i++;
                }
                fmt::print("Finish generating polynomial features! Use .GetPolynomialFeatures() to get access it.\n");
                fmt::print("*********************************\n");
                if (add_back==true){
                    RD.ConcatenateData(__polynomialFeatures);
                    fmt::print("Notice that CRD.X has been modified. The dimension of X is ({:},{:}). {:} columns of polynomial features have been added.\n",RD.GetrowsX(),RD.GetcolsX(),__polynomialFeatures.cols());
                }
            }

Member Function Documentation

GetInteractionFeatures()

template<Numeric NumericType>

decltype(auto) Cosan::PolynomialFeatures< NumericType >::GetInteractionFeatures ( )

inline

Definition at line 109 of file polynomialfeatures.h.

{return __interactionFeatures;}

GetPolynomialFeatures()

template<Numeric NumericType>

decltype(auto) Cosan::PolynomialFeatures< NumericType >::GetPolynomialFeatures ( )

inline

Definition at line 108 of file polynomialfeatures.h.

{return __polynomialFeatures;}

SetInteractionFeatures()

template<Numeric NumericType>

void Cosan::PolynomialFeatures< NumericType >::SetInteractionFeatures ( CosanRawData< NumericType > &  RD, std::pair< gsl::index, gsl::index >  pair, bool  add_back = false  )

inline

Definition at line 41 of file polynomialfeatures.h.

                                                                                                                            {
                fmt::print("*********************************\n");
                fmt::print("Begin generating interaction features between {:d} and {:d}!!\n",pair.first,pair.second);
                decltype(auto) X = RD.GetInput();
                __interactionFeatures.conservativeResize(X.rows(),1);
                __polynomialFeatures.col(0) = X.col(pair.first).array()*X.col(pair.second).array();
                fmt::print("End of generating interaction features. Get access to it via .GetInteractionFeatures()\n",pair.first,pair.second);
                fmt::print("*********************************\n");
                if (add_back==true){
                    RD.ConcatenateData(__interactionFeatures);
                    fmt::print("Notice that CRD.X has been modified. The dimension of X is ({:d},{:d}). {:d} columns of interaction features have been added.\n",RD.GetrowsX(),RD.GetcolsX(),__interactionFeatures.cols());
                }
 
            }

UpdatePolynomialFeatures()

template<Numeric NumericType>

void Cosan::PolynomialFeatures< NumericType >::UpdatePolynomialFeatures ( CosanMatrix< NumericType >  inputX )

inline

Definition at line 110 of file polynomialfeatures.h.

{return __polynomialFeatures = inputX;  }

Member Data Documentation

__interactionFeatures

template<Numeric NumericType>

CosanMatrix<NumericType> Cosan::PolynomialFeatures< NumericType >::__interactionFeatures

private

Definition at line 113 of file polynomialfeatures.h.

__polynomialFeatures

template<Numeric NumericType>

CosanMatrix<NumericType> Cosan::PolynomialFeatures< NumericType >::__polynomialFeatures

private

Definition at line 112 of file polynomialfeatures.h.

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

• cosan/preprocessing/polynomialfeatures.h