emtf::PercentErrorSquared Class Reference

#include <LossFunctions.h>

Inheritance diagram for emtf::PercentErrorSquared:

Public Member Functions
double	fit (std::vector< Event * > &v) override
int	id () override
std::string	name () override
	PercentErrorSquared ()
double	target (Event *e) override
virtual	~PercentErrorSquared ()
Public Member Functions inherited from emtf::LossFunction
virtual	~LossFunction ()=default

Detailed Description

Definition at line 194 of file LossFunctions.h.

Constructor & Destructor Documentation

emtf::PercentErrorSquared::PercentErrorSquared ( )

inline

Definition at line 197 of file LossFunctions.h.

{}

virtual emtf::PercentErrorSquared::~PercentErrorSquared ( )

inlinevirtual

Definition at line 198 of file LossFunctions.h.

{}

Member Function Documentation

double emtf::PercentErrorSquared::fit ( std::vector< Event * > &  v )

inlineoverridevirtual

Implements emtf::LossFunction.

Definition at line 206 of file LossFunctions.h.

References MillePedeFileConverter_cfg::e, mps_fire::i, emtf::Event::predictedValue, and emtf::Event::trueValue.

Referenced by trackingPlots.Iteration::modules().

        {   
        // The average of the weighted residuals minimizes the squared percent error.
        // Weight(i) = 1/true(i)^2. 
    
            double SUMtop = 0;
            double SUMbottom = 0;
    
            for(unsigned int i=0; i<v.size(); i++)
            {   
                Event* e = v[i];
                SUMtop += (e->trueValue - e->predictedValue)/(e->trueValue*e->trueValue); 
                SUMbottom += 1/(e->trueValue*e->trueValue);
            }   
    
            return SUMtop/SUMbottom;
        }   

int emtf::PercentErrorSquared::id ( void  )

inlineoverridevirtual

Implements emtf::LossFunction.

Definition at line 224 of file LossFunctions.h.

{ return 4; }

std::string emtf::PercentErrorSquared::name ( void  )

inlineoverridevirtual

Implements emtf::LossFunction.

Definition at line 223 of file LossFunctions.h.

Referenced by config.CFG::__str__(), validation.Sample::digest(), and VIDSelectorBase.VIDSelectorBase::initialize().

{ return "Percent_Error"; }

double emtf::PercentErrorSquared::target ( Event *  e )

inlineoverridevirtual

Implements emtf::LossFunction.

Definition at line 200 of file LossFunctions.h.

References emtf::Event::predictedValue, and emtf::Event::trueValue.

        {   
        // The gradient of the squared percent error.
            return (e->trueValue - e->predictedValue)/(e->trueValue * e->trueValue);
        }