BinomialProbability Class Reference

#include <BinomialProbability.h>

List of all members.

Public Member Functions
	BinomialProbability ()
	BinomialProbability (int hits, int entries)
int	entries () const
float	error () const
void	hit ()
int	hits () const
void	miss ()
void	update (bool hit)
float	value () const
Private Attributes
int	theHits
int	theTotal

---

Detailed Description

A simple class for accumulating binomial "events", i.e. events that have a yes/no outcome, and for computing the binomial error on the fraction of positive hits.

Definition at line 10 of file BinomialProbability.h.

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Constructor & Destructor Documentation

BinomialProbability::BinomialProbability

(

)

[inline]

Definition at line 13 of file BinomialProbability.h.

: theHits(0), theTotal(0) {}

BinomialProbability::BinomialProbability	(	int	hits,
		int	entries
	)		[inline]

Definition at line 15 of file BinomialProbability.h.

                                             : 
    theHits(hits), theTotal(entries) {}

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Member Function Documentation

int BinomialProbability::entries

(

)

const [inline]

Definition at line 27 of file BinomialProbability.h.

References theTotal.

{ return theTotal;}

float BinomialProbability::error

(

)

const [inline]

Definition at line 22 of file BinomialProbability.h.

References f, AlCaHLTBitMon_ParallelJobs::p, mathSSE::sqrt(), theTotal, and value().

                      {
    float p = value();
    return theTotal <= 1 ? 0 : sqrt( p*(1.f - p)/(theTotal-1));
  }

void BinomialProbability::hit

(

void

)

[inline]

Definition at line 31 of file BinomialProbability.h.

References theHits, and theTotal.

{ theHits++; theTotal++;}

int BinomialProbability::hits

(

)

const [inline]

Definition at line 29 of file BinomialProbability.h.

References theHits.

{ return theHits;}

void BinomialProbability::miss

(

)

[inline]

Definition at line 33 of file BinomialProbability.h.

References theTotal.

{ theTotal++;}

void BinomialProbability::update

(

bool

hit

)

[inline]

Definition at line 35 of file BinomialProbability.h.

References theHits, and theTotal.

                         {
    if ( hit) theHits++;
    theTotal++;
  }

float BinomialProbability::value

(

)

const [inline]

Definition at line 18 of file BinomialProbability.h.

References theHits, and theTotal.

Referenced by error().

                      {
    return theTotal == 0 ? 0 :float(theHits) / float(theTotal);
  }

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Member Data Documentation

int BinomialProbability::theHits [private]

Definition at line 42 of file BinomialProbability.h.

Referenced by hit(), hits(), update(), and value().

int BinomialProbability::theTotal [private]

Definition at line 43 of file BinomialProbability.h.

Referenced by entries(), error(), hit(), miss(), update(), and value().