StatEntity Class Reference

The basic counter used for Monitoring purposes. More...

#include <GaudiKernel/StatEntity.h>

Public Member Functions
	StatEntity ()
	the default constructor More...
	StatEntity (const unsigned long entries, const double flag, const double flag2, const double minFlag, const double maxFlag)
	~StatEntity ()
	destructor More...
const unsigned long &	nEntries () const
	getters More...
const double &	sum () const
	accumulated value More...
const double &	sum2 () const
	accumulated value**2 More...
double	mean () const
	mean value of counter More...
double	rms () const
	r.m.s of value More...
double	meanErr () const
	error in mean value of counter More...
const double &	min () const
	minimal value More...
const double &	max () const
	maximal value More...
double	efficiency () const
	Interpret the counter as some measure of efficiency The efficiency is calculated as the ratio of the weight over the number of entries One gets the correct interpretation in the case of filling the counters only with 0 and 1. More...
double	efficiencyErr () const
	Interpret the counter as some measure of efficiency and evaluate the uncertainty of this efficiency using binomial estimate. More...
double	eff () const
	shortcut, More...
double	effErr () const
	shortcut, More...
StatEntity &	operator+= (const double f)
	General increment operator for the flag Could be used for easy manipulation with StatEntity object: More...
StatEntity &	operator++ ()
	Pre-increment operator for the flag Could be used for easy manipulation with StatEntity object: More...
StatEntity &	operator++ (int)
	Post-increment operator for the flag. More...
StatEntity &	operator-= (const double f)
	General decrement operator for the flag Could be used for easy manipulation with StatEntity object: More...
StatEntity &	operator-- ()
	Pre-decrement operator for the flag Could be used for easy manipulation with StatEntity object: More...
StatEntity &	operator-- (int)
	Post-decrement operator for the flag Could be used for easy manipulation with StatEntity object: More...
StatEntity &	operator= (const double f)
	Assignment from the flag The action: reset and the general increment Such case could be useful for statistical monitoring. More...
StatEntity &	operator+= (const StatEntity &other)
	increment with other counter (useful for Monitoring/Adder ) More...
bool	operator< (const StatEntity &se) const
	comparison More...
unsigned long	add (const double Flag)
	add a value More...
void	reset ()
	reset the counters More...
void	setnEntriesBeforeReset (unsigned long nEntriesBeforeReset)
	DR specify number of entry before reset. More...
std::string	toString () const
	representation as string More...
std::ostream &	print (std::ostream &o=std::cout) const
	printout to std::ostream More...
std::ostream &	fillStream (std::ostream &o) const
	printout to std::ostream More...
double	Sum () const
	get sum More...
double	Mean () const
	get mean More...
double	MeanErr () const
	get error in mean More...
double	Rms () const
	get rms More...
double	RMS () const
	get rms More...
double	Eff () const
	get efficiency More...
double	Min () const
	get minimal value More...
double	Max () const
	get maximal value More...
double	flag () const
	accumulated "flag" More...
double	flag2 () const
	accumulated "flag squared" More...
double	flagMean () const
	mean value of flag More...
double	flagRMS () const
	r.m.s of flag More...
double	flagMeanErr () const
	error in mean value of flag More...
double	flagMin () const
	minimal flag More...
double	flagMax () const
	maximal flag More...
unsigned long	addFlag (const double Flag)
	add a flag More...

Static Public Member Functions
static const std::string &	format ()
	the internal format description More...
static int	size ()
	the actual size of published data More...

Private Attributes
unsigned long	m_se_nEntries
	number of calls More...
double	m_se_accumulatedFlag
	accumulated flag More...
double	m_se_accumulatedFlag2
double	m_se_minimalFlag
double	m_se_maximalFlag
long	m_se_nEntriesBeforeReset

Detailed Description

The basic counter used for Monitoring purposes.

It is used as a small helper class for implementation of class ChronoStatSvc but it also could be used in stand-alone mode to perform trivial statistical evaluations. e.g.

Essentially the generic counter could be considered as the trivial 1-bin

// get all tracks
const Tracks* tracks = ... ;
// create the counter
StatEntity chi2 ;
// make a loop over all tracks:
for ( Tracks::const_iterator itrack = tracks->begin() ;
      tracks->end() != itrack ; ++itrack )
 {
     const Track* track = *itrack ;

     // use the counters to accumulate information:
     chi2 += track -> chi2  () ;
 } ;

// Extract the information from the counter:

// get number of entries (== number of tracks)
int nEntries = chi2.nEntries() ;

// get the minimal value of chi2
double chi2Min = chi2.flagMin() ;

// get the average value of chi2:
double meanChi2 = chi2.flagMean() ;

// get R.M.S. for chi2-distribution:
double rmsChi2   = chi2.flagRMS() ;

.. etc...

Author

Vanya BELYAEV Ivan..nosp@m.Bely.nosp@m.aev@l.nosp@m.app..nosp@m.in2p3.nosp@m..fr

Date

26/11/1999

2005-08-02

Definition at line 68 of file StatEntity.h.

Constructor & Destructor Documentation

StatEntity::StatEntity ( )

inline

the default constructor

Definition at line 73 of file StatEntity.h.

{ reset() ; }

StatEntity::StatEntity	(	const unsigned long	entries,
		const double	flag,
		const double	flag2,
		const double	minFlag,
		const double	maxFlag
	)

Definition at line 48 of file StatEntity.cpp.

  : m_se_nEntries            ( entries )
  , m_se_accumulatedFlag     ( flag    ) 
  , m_se_accumulatedFlag2    ( flag2   ) 
  , m_se_minimalFlag         ( minFlag ) 
  , m_se_maximalFlag         ( maxFlag ) 
  , m_se_nEntriesBeforeReset ( -1      )
{}

StatEntity::~StatEntity ( )

inline

destructor

Definition at line 91 of file StatEntity.h.

{}

Member Function Documentation

unsigned long StatEntity::add

(

const double

Flag

)

add a value

Parameters

Flag	value to be added

Returns

number of entries

accumulate the flag

evaluate min/max

Definition at line 189 of file StatEntity.cpp.

{  
  //
  if      ( 0 <  m_se_nEntriesBeforeReset ) { --m_se_nEntriesBeforeReset; }
  else if ( 0 == m_se_nEntriesBeforeReset ) { reset(); } 
  m_se_accumulatedFlag   += Flag        ; // accumulate the flag
  m_se_minimalFlag = std::min ( m_se_minimalFlag , Flag ) ; // evaluate min/max 
  m_se_maximalFlag = std::max ( m_se_maximalFlag , Flag ) ; // evaluate min/max 
  // accumulate statistics, but avoid FPE for small flags... 
  static const double s_min1 = 2 * ::sqrt ( std::numeric_limits<double>::min() ) ;
  if ( s_min1 < Flag || -s_min1 > Flag )  
  { m_se_accumulatedFlag2  += Flag * Flag ; }// accumulate statistics:
  //
  return ++m_se_nEntries ;  
}

unsigned long StatEntity::addFlag ( const double  Flag )

inline

add a flag

Parameters

Flag	value to be added

Returns

number of entries

Definition at line 416 of file StatEntity.h.

{ return add ( Flag ) ; }

double StatEntity::eff ( ) const

inline

shortcut,

See also

StatEntity::efficiency

Definition at line 185 of file StatEntity.h.

{ return efficiency    () ; }

double StatEntity::Eff ( ) const

inline

get efficiency

Definition at line 390 of file StatEntity.h.

{ return eff     () ; } // get efficiency

double StatEntity::effErr ( ) const

inline

shortcut,

See also

StatEntity::efficiencyErr

Definition at line 187 of file StatEntity.h.

{ return efficiencyErr () ; }

double StatEntity::efficiency

(

)

const

Interpret the counter as some measure of efficiency The efficiency is calculated as the ratio of the weight over the number of entries One gets the correct interpretation in the case of filling the counters only with 0 and 1.

Some checks are performed:

• number of counts must be positive
• "flag" must be non-negative
• "flag" does not exceed the overall number of counts

If these conditions are not satisfied the method returns -1, otherwise it returns the value of "flagMean"

StatEntity& stat = ... ;

for ( TRACKS::iterator itrack = tracks.begin() ;
      tracks.end() != itrack ; itrack )
 {
   const bool good = PT( *itrack ) > 1 * Gaudi::Units::GeV ;
   stat += good ;
 }

std::cout << " Efficiency of PT-cut is "
          << stat.efficiency() << std::endl ;

See also

StatEntity::flagMean

StatEntity::eff

StatEntity::efficiencyErr

Definition at line 123 of file StatEntity.cpp.

{
  if ( 1 > nEntries () || 0 > sum() || sum() > nEntries() ) { return -1 ; }
  const long double fMin = min () ;
  if ( 0 != fMin && 1 != fMin ) { return -1 ; }
  const long double fMax = max () ;
  if ( 0 != fMax && 1 != fMax ) { return -1 ; }
  return mean() ;
}

double StatEntity::efficiencyErr

(

)

const

Interpret the counter as some measure of efficiency and evaluate the uncertainty of this efficiency using binomial estimate.

The efficiency is calculated as the ratio of the weight over the number of entries One gets the correct interpretation in the case of filling the counters only with 0 and 1. Some checks are performed:

• number of counts must be positive
• "flag" must be non-negative
• "flag" does not exceed the overall number of counts

If these conditions are not satisfied the method returns -1.

Attention

The action of this method is DIFFERENT from the action of the method StatEntity::flagMeanErr

StatEntity& stat = ... ;

for ( TRACKS::iterator itrack = tracks.begin() ;
      tracks.end() != itrack ; itrack )
 {
   const bool good = PT( *itrack ) > 1 * Gaudi::Units::GeV ;
   stat += good ;
 }

std::cout << " Efficiency of PT-cut is "
          << stat.efficiency    () << "+-"
          << stat.efficiencyErr () << std::endl ;

See also

StatEntity::efficiency

StatEntity::effErr

StatEntity::flagMeanErr

Definition at line 135 of file StatEntity.cpp.

{
  if ( 0 > efficiency() ) { return -1 ; }
  //
  long double n1 = sum () ;
  // treat properly the bins with eff=0 
  if ( 0 == n1 ) { n1 = 1 ; } 
  const long double n3 = nEntries  () ;
  long double       n2 = n3 - flag () ;
  // treat properly the bins with eff=100% 
  if ( 1 > fabsl( n2 ) ) { n2 = 1 ; } 
  //
  return ::sqrtl( n1 * n2 / n3 ) / n3 ;
}

std::ostream& StatEntity::fillStream ( std::ostream &  o ) const

inline

printout to std::ostream

Parameters

s	the reference to the output stream

Definition at line 375 of file StatEntity.h.

{ return print ( o ) ; }

double StatEntity::flag ( ) const

inline

accumulated "flag"

Definition at line 399 of file StatEntity.h.

{ return sum     () ; }

double StatEntity::flag2 ( ) const

inline

accumulated "flag squared"

Definition at line 401 of file StatEntity.h.

{ return sum2    () ; }

double StatEntity::flagMax ( ) const

inline

maximal flag

Definition at line 411 of file StatEntity.h.

{ return max     () ; }

double StatEntity::flagMean ( ) const

inline

mean value of flag

Definition at line 403 of file StatEntity.h.

{ return mean    () ; }

double StatEntity::flagMeanErr ( ) const

inline

error in mean value of flag

Definition at line 407 of file StatEntity.h.

{ return meanErr () ; }

double StatEntity::flagMin ( ) const

inline

minimal flag

Definition at line 409 of file StatEntity.h.

{ return min     () ; }

double StatEntity::flagRMS ( ) const

inline

r.m.s of flag

Definition at line 405 of file StatEntity.h.

{ return rms     () ; }

const std::string & StatEntity::format ( )

static

the internal format description

Attention

: it needs to be coherent with the actual class structure! It is useful for DIM publishing

See also

StatEntity::size

< check for "D"

Definition at line 63 of file StatEntity.cpp.

{
  // check for "X" or "L"
  BOOST_STATIC_ASSERT(((sizeof(unsigned long)==4)||(sizeof(unsigned long)==8)));
  // check for "D"
  BOOST_STATIC_ASSERT((sizeof(double)==8))        ; 
  //
  static const std::string s_fmt = 
    ( ( 8 == sizeof(unsigned long) ) ?"X:1;" : "L:1;" ) + std::string("D:4") ;
  return s_fmt ;
} 

const double& StatEntity::max ( ) const

inline

maximal value

Definition at line 110 of file StatEntity.h.

{ return m_se_maximalFlag ; }

double StatEntity::Max ( ) const

inline

get maximal value

Definition at line 394 of file StatEntity.h.

{ return max     () ; } // get maximal value

double StatEntity::mean

(

)

const

mean value of counter

Definition at line 85 of file StatEntity.cpp.

{ 
  if ( 0 >= nEntries() ) { return 0 ;}
  const long double f1 = m_se_accumulatedFlag ;
  const long double f2 = m_se_nEntries ;
  return f1 / f2 ;
}

double StatEntity::Mean ( ) const

inline

get mean

Definition at line 382 of file StatEntity.h.

{ return mean    () ; } // get mean

double StatEntity::meanErr

(

)

const

error in mean value of counter

Definition at line 108 of file StatEntity.cpp.

{
  if ( 0 >= nEntries () ) { return 0 ; }
  const long double f1  = m_se_accumulatedFlag  ;
  const long double f2  = f1 / nEntries () ;
  const long double f3  = m_se_accumulatedFlag2 ;
  const long double f4  = f3 / nEntries () ;
  const long double result = f4 - f2 * f2  ;
  if ( 0 > result      ) { return 0 ; }
  //
  return ::sqrtl ( result / nEntries () ) ;
}

double StatEntity::MeanErr ( ) const

inline

get error in mean

Definition at line 384 of file StatEntity.h.

{ return meanErr () ; } // get error in mean

const double& StatEntity::min ( ) const

inline

minimal value

Definition at line 108 of file StatEntity.h.

{ return m_se_minimalFlag ; }

double StatEntity::Min ( ) const

inline

get minimal value

Definition at line 392 of file StatEntity.h.

{ return min     () ; } // get minimal value

const unsigned long& StatEntity::nEntries ( ) const

inline

getters

Definition at line 96 of file StatEntity.h.

{ return m_se_nEntries         ; }

StatEntity& StatEntity::operator++ ( )

inline

Pre-increment operator for the flag Could be used for easy manipulation with StatEntity object:

StatEntity stat ;

for ( int i =    ... )
 {
    double eTotal = .... ;

    // increment the counter
    if ( eTotal > 1 * TeV ) { ++stat ; } ;
 }

Definition at line 232 of file StatEntity.h.

{ return   (*this)+= 1  ; }

StatEntity& StatEntity::operator++ ( int  )

inline

Post-increment operator for the flag.

Actually it is the same as pre-increment. Could be used for easy manipulation with StatEntity object:

StatEntity stat ;

for ( int i =    ... )
 {
    double eTotal = .... ;

    // increment the counter
    if ( eTotal > 1 * TeV ) { stat++ ; } ;
 }

Definition at line 251 of file StatEntity.h.

{ return ++(*this)      ; }

StatEntity& StatEntity::operator+= ( const double  f )

inline

General increment operator for the flag Could be used for easy manipulation with StatEntity object:

StatEntity stat ;

for ( int i =    ... )
 {
    double eTotal = .... ;

    // increment the counter
    stat += eTotal ;
 }

Parameters

f	counter increment

Definition at line 210 of file StatEntity.h.

  {
    addFlag ( f ) ;
    return *this ;
  }

StatEntity & StatEntity::operator+=

(

const StatEntity &

other

)

increment with other counter (useful for Monitoring/Adder )

const StatEntity second = ... ;

StatEntity first = ... ;

first += second ;

Parameters

other

counter to be added

Returns

self-reference

Definition at line 152 of file StatEntity.cpp.

{
  m_se_nEntries         += other.m_se_nEntries ;
  m_se_accumulatedFlag  += other.m_se_accumulatedFlag  ;
  m_se_accumulatedFlag2 += other.m_se_accumulatedFlag2 ;
  m_se_minimalFlag = std::min ( m_se_minimalFlag , other.m_se_minimalFlag ) ;
  m_se_maximalFlag = std::max ( m_se_maximalFlag , other.m_se_maximalFlag ) ;
  //
  return *this ;
}

StatEntity& StatEntity::operator-- ( )

inline

Pre-decrement operator for the flag Could be used for easy manipulation with StatEntity object:

StatEntity stat ;

for ( int i =    ... )
 {
    double eTotal = .... ;

    // increment the counter
    if ( eTotal > 1 * TeV ) { --stat ; } ;
 }

Definition at line 293 of file StatEntity.h.

{ return (*this)-=1  ; }

StatEntity& StatEntity::operator-- ( int  )

inline

Post-decrement operator for the flag Could be used for easy manipulation with StatEntity object:

StatEntity stat ;

for ( int i =    ... )
 {
    double eTotal = .... ;

    // increment the counter
    if ( eTotal > 1 * TeV ) { stat-- ; } ;
 }

Definition at line 311 of file StatEntity.h.

{ return --(*this) ; }

StatEntity& StatEntity::operator-= ( const double  f )

inline

General decrement operator for the flag Could be used for easy manipulation with StatEntity object:

StatEntity stat ;

for ( int i =    ... )
 {
    double eTotal = .... ;

    // decrement the counter
    stat -= eTotal ;
 }

Parameters

f	counter increment

Definition at line 271 of file StatEntity.h.

  {
    addFlag ( -f ) ;
    return *this ;
  }

bool StatEntity::operator<

(

const StatEntity &

se

)

const

comparison

Definition at line 165 of file StatEntity.cpp.

{  
  if      ( &se == this                     ) { return false ; }
  else if ( nEntries () <   se.nEntries ()  ) { return true  ; }
  else if ( nEntries () ==  se.nEntries () && 
            sum      () <   se.sum      ()  ) { return true  ; } 
  else if ( nEntries () ==  se.nEntries () && 
            sum      () ==  se.sum      () &&  
            min      () <   se.min      ()  ) { return true  ; } 
  else if ( nEntries () ==  se.nEntries () && 
            sum      () ==  se.sum      () &&  
            min      () ==  se.min      () &&
            max      () <   se.max      ()  ) { return true  ; } 
  else if ( nEntries () ==  se.nEntries () && 
            sum      () ==  se.flag     () &&  
            min      () ==  se.min      () &&
            max      () ==  se.max      () && 
            sum2     () <   se.sum2     ()  ) { return true  ; }
  return false; 
}

StatEntity& StatEntity::operator= ( const double  f )

inline

Assignment from the flag The action: reset and the general increment Such case could be useful for statistical monitoring.

const long numberOfHits = ... ;

StatEntity& stat = ... ;

stat = numberOfHits ;

Parameters

f	new value of the counter

Returns

self-reference

< reset the statistics

< use the regular increment

Definition at line 329 of file StatEntity.h.

  {
    // reset the statistics
    reset() ;            
    // use the regular increment
    return ((*this)+=f); 
  }

std::ostream & StatEntity::print

(

std::ostream &

o = std::cout

)

const

printout to std::ostream

Parameters

s	the reference to the output stream

Definition at line 236 of file StatEntity.cpp.

{
  boost::format fmt1 ("#=%|-7lu| Sum=%|-11.5g|" ) ;
  o << fmt1 % nEntries() % sum() ;
  boost::format fmt2 ( " Mean=%|#10.4g| +- %|-#10.5g| Min/Max=%|#10.4g|/%|-#10.4g|" ) ;
  o << fmt2 % mean() % rms() % min() % max() ;
  return o ;
}

void StatEntity::reset

(

)

reset the counters

Definition at line 209 of file StatEntity.cpp.

{
  //
  m_se_nEntries            =        0 ;
  m_se_accumulatedFlag     =        0 ; 
  m_se_minimalFlag         =       std::numeric_limits<double>::max() ;
  m_se_maximalFlag         =  -1 * std::numeric_limits<double>::max() ;
  m_se_accumulatedFlag2    =        0 ;
  m_se_nEntriesBeforeReset =       -1 ; // ? 
}

double StatEntity::rms

(

)

const

r.m.s of value

Definition at line 95 of file StatEntity.cpp.

{
  if ( 0 >= nEntries() ) { return 0 ; }
  const long double f1  = m_se_accumulatedFlag  ;
  const long double f2  = f1 / nEntries () ;
  const long double f3  = m_se_accumulatedFlag2 ;
  const long double f4  = f3 / nEntries () ;
  const long double result = f4 - f2 * f2  ;
  return ( 0 > result ) ? 0 : ::sqrtl ( result ) ; 
} 

double StatEntity::Rms ( ) const

inline

get rms

Definition at line 386 of file StatEntity.h.

{ return rms     () ; } // get rms

double StatEntity::RMS ( ) const

inline

get rms

Definition at line 388 of file StatEntity.h.

{ return rms     () ; } // get rms

void StatEntity::setnEntriesBeforeReset

(

unsigned long

nEntriesBeforeReset

)

DR specify number of entry before reset.

Definition at line 222 of file StatEntity.cpp.

{ m_se_nEntriesBeforeReset = nEntriesBeforeReset; }

int StatEntity::size ( )

static

the actual size of published data

Attention

: it needs to be coherent with the actual class structure! It is useful for DIM publishing

See also

StatEntity::format

Definition at line 77 of file StatEntity.cpp.

{ 
  static const int s_size = sizeof(unsigned long) + 4 * sizeof(double) ; 
  return s_size ;
}   

const double& StatEntity::sum ( ) const

inline

accumulated value

Definition at line 98 of file StatEntity.h.

{ return m_se_accumulatedFlag  ; }

double StatEntity::Sum ( ) const

inline

get sum

Definition at line 380 of file StatEntity.h.

{ return sum     () ; } // get sum

const double& StatEntity::sum2 ( ) const

inline

accumulated value**2

Definition at line 100 of file StatEntity.h.

{ return m_se_accumulatedFlag2 ; }

std::string StatEntity::toString

(

)

const

representation as string

Definition at line 227 of file StatEntity.cpp.

{
  std::ostringstream ost ;
  print ( ost )  ;
  return ost.str () ;
} 

Member Data Documentation

double StatEntity::m_se_accumulatedFlag

private

accumulated flag

Definition at line 440 of file StatEntity.h.

double StatEntity::m_se_accumulatedFlag2

private

Definition at line 441 of file StatEntity.h.

double StatEntity::m_se_maximalFlag

private

Definition at line 443 of file StatEntity.h.

double StatEntity::m_se_minimalFlag

private

Definition at line 442 of file StatEntity.h.

unsigned long StatEntity::m_se_nEntries

private

number of calls

Definition at line 438 of file StatEntity.h.

long StatEntity::m_se_nEntriesBeforeReset

private

Definition at line 445 of file StatEntity.h.

---

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

• GaudiKernel/GaudiKernel/StatEntity.h
• GaudiKernel/src/Lib/StatEntity.cpp