GSUtilities Class Reference

#include <GSUtilities.h>

Public Member Functions
double	cdf (const double &) const
	value of integral(pdf) More...
double	combinedMean () const
	mean value of combined state More...
double	dpdf1 (const double &) const
	first derivative of pdf More...
double	dpdf2 (const double &) const
	second derivative of pdf More...
double	errorCombinedMean () const
float	errorHighestWeight () const
float	errorMode ()
float	getMax (float)
float	getMin (float)
	GSUtilities (const unsigned nComp, const float *weights, const float *parameters, const float *errors)
	constructor from arrays of weights, parameters and standard deviations More...
float	maxWeight () const
float	mode () const
	mode More...
double	pdf (const double &) const
	value of the pdf More...
float	quantile (const float) const
	~GSUtilities ()

Private Member Functions
double	findMode (const double) const
double	gauss (const double &, const double &, const double &) const
	value of gaussian distribution More...
double	gaussInt (const double &, const double &, const double &) const
	integrated value of gaussian distribution More...

Private Attributes
float *	theErrors
unsigned	theNComp
float *	theParameters
float *	theWeights

Detailed Description

Some utilities for analysing 1D Gaussian mixtures. Copied from ORCA's EgammaGSUtilities.

Definition at line 8 of file GSUtilities.h.

Constructor & Destructor Documentation

GSUtilities::GSUtilities ( const unsigned  nComp, const float *  weights, const float *  parameters, const float *  errors  )

inline

constructor from arrays of weights, parameters and standard deviations

Definition at line 11 of file GSUtilities.h.

References i, theErrors, theNComp, theParameters, and theWeights.

                                                         :
    theNComp(nComp),
    theWeights(0),
    theParameters(0),
    theErrors(0)
  {
    if ( theNComp ) {
      theWeights = new float[theNComp];
      theParameters = new float[theNComp];
      theErrors = new float[theNComp];
    }
    const float* wPtr1(weights);
    const float* pPtr1(parameters);
    const float* ePtr1(errors);
    float* wPtr2(theWeights);
    float* pPtr2(theParameters);
    float* ePtr2(theErrors);
    for ( unsigned i=0; i<theNComp; i++ ) {
      *(wPtr2++) = weights ? *(wPtr1++) : 1.;
      *(pPtr2++) = *(pPtr1++);
      *(ePtr2++) = *(ePtr1++);
    }
  } 

GSUtilities::~GSUtilities ( )

inline

Definition at line 35 of file GSUtilities.h.

References theErrors, theParameters, and theWeights.

  {
    delete [] theWeights;
    delete [] theParameters;
    delete [] theErrors;
  }

Member Function Documentation

double GSUtilities::cdf

(

const double &

x

)

const

value of integral(pdf)

Definition at line 157 of file GSUtilities.cc.

double GSUtilities::combinedMean

(

)

const

mean value of combined state

Definition at line 210 of file GSUtilities.cc.

double GSUtilities::dpdf1

(

const double &

x

)

const

first derivative of pdf

Definition at line 166 of file GSUtilities.cc.

double GSUtilities::dpdf2

(

const double &

x

)

const

second derivative of pdf

Definition at line 178 of file GSUtilities.cc.

double GSUtilities::errorCombinedMean

(

)

const

Definition at line 222 of file GSUtilities.cc.

float GSUtilities::errorHighestWeight

(

)

const

Definition at line 73 of file GSUtilities.cc.

float GSUtilities::errorMode

(

)

Definition at line 249 of file GSUtilities.cc.

double GSUtilities::findMode ( const double  xStart ) const

private

mean value of combined state double combinedMean() const; mode from starting value

Definition at line 122 of file GSUtilities.cc.

double GSUtilities::gauss ( const double &  x, const double &  mean, const double &  sigma  ) const

private

value of gaussian distribution

Definition at line 190 of file GSUtilities.cc.

double GSUtilities::gaussInt ( const double &  x, const double &  mean, const double &  sigma  ) const

private

integrated value of gaussian distribution

Definition at line 203 of file GSUtilities.cc.

float GSUtilities::getMax

(

float

x

)

Definition at line 291 of file GSUtilities.cc.

float GSUtilities::getMin

(

float

x

)

Definition at line 278 of file GSUtilities.cc.

float GSUtilities::maxWeight

(

)

const

Definition at line 232 of file GSUtilities.cc.

float GSUtilities::mode

(

void

)

const

mode

Definition at line 88 of file GSUtilities.cc.

double GSUtilities::pdf

(

const double &

x

)

const

value of the pdf

Definition at line 148 of file GSUtilities.cc.

float GSUtilities::quantile

(

const float

q

)

const

normalised integral from -inf to x (taking into account under- & overflows)

Definition at line 12 of file GSUtilities.cc.

Member Data Documentation

float* GSUtilities::theErrors

private

Definition at line 83 of file GSUtilities.h.

Referenced by GSUtilities(), and ~GSUtilities().

unsigned GSUtilities::theNComp

private

Definition at line 80 of file GSUtilities.h.

Referenced by GSUtilities().

float* GSUtilities::theParameters

private

Definition at line 82 of file GSUtilities.h.

Referenced by GSUtilities(), and ~GSUtilities().

float* GSUtilities::theWeights

private

Definition at line 81 of file GSUtilities.h.

Referenced by GSUtilities(), and ~GSUtilities().