emtf::AbsoluteDeviation Class Reference

#include <LossFunctions.h>

Inheritance diagram for emtf::AbsoluteDeviation:

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

Detailed Description

Definition at line 74 of file LossFunctions.h.

Constructor & Destructor Documentation

emtf::AbsoluteDeviation::AbsoluteDeviation ( )

inline

Definition at line 77 of file LossFunctions.h.

{}

virtual emtf::AbsoluteDeviation::~AbsoluteDeviation ( )

inlinevirtual

Definition at line 78 of file LossFunctions.h.

{}

Member Function Documentation

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

inlineoverridevirtual

Implements emtf::LossFunction.

Definition at line 89 of file LossFunctions.h.

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

Referenced by trackingPlots.Iteration::modules().

        {
        // The median of the residuals minimizes absolute deviation.
            if(v.empty()) return 0;
            std::vector<double> residuals(v.size());
       
            // Load the residuals into a vector. 
            for(unsigned int i=0; i<v.size(); i++)
            {
                Event* e = v[i];
                residuals[i] = (e->trueValue - e->predictedValue);
            }

            // Get the median and return it.
            int median_loc = (residuals.size()-1)/2;

            // Odd.
            if(residuals.size()%2 != 0)
            {
                std::nth_element(residuals.begin(), residuals.begin()+median_loc, residuals.end());
                return residuals[median_loc];
            }
            
            // Even.
            else
            {
                std::nth_element(residuals.begin(), residuals.begin()+median_loc, residuals.end());
                double low = residuals[median_loc];
                std::nth_element(residuals.begin()+median_loc+1, residuals.begin()+median_loc+1, residuals.end());
                double high = residuals[median_loc+1];
                return (high + low)/2;
            }
        }

int emtf::AbsoluteDeviation::id ( void  )

inlineoverridevirtual

Implements emtf::LossFunction.

Definition at line 123 of file LossFunctions.h.

{ return 2; }

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

inlineoverridevirtual

Implements emtf::LossFunction.

Definition at line 122 of file LossFunctions.h.

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

{ return "Absolute_Deviation"; }

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

inlineoverridevirtual

Implements emtf::LossFunction.

Definition at line 80 of file LossFunctions.h.

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

        {
        // The gradient.
            if ((e->trueValue - e->predictedValue) >= 0)
                return 1;
            else
                return -1;
        }