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DeterministicAnnealing Class Reference

A very simple class that returns the association probabilty of a (any) chi2 value, given a cutoff. More...

#include <RecoVertex/VertexTools/interface/DeterministicAnnealing.h>

Inheritance diagram for DeterministicAnnealing:

List of all members.

Public Member Functions
void	anneal ()
DeterministicAnnealing *	clone () const
double	currentTemp () const
double	cutoff () const
	Returns phi(chi2) / ( phi(cutoff^2) + sum_i { phi(chi2s[i]) } ).
void	debug () const
	DeterministicAnnealing (const std::vector< float > &sched, float cutoff=3.0)
	DeterministicAnnealing (float cutoff=3.0)
double	initialTemp () const
bool	isAnnealed () const
	is it annealed yet?
double	phi (double chi2) const
	phi ( chi2 ) = e^( -.5*chi2 / T )
void	resetAnnealing ()
double	weight (double chi2) const
	Returns phi(chi2) / ( phi(cutoff^2) + phi(chi2) ),.
Private Attributes
double	theChi2cut
unsigned int	theIndex
bool	theIsAnnealed

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Detailed Description

A very simple class that returns the association probabilty of a (any) chi2 value, given a cutoff.

Default schedule is 256 64 16 4 2 1 Note that cutoff is given "sigma-like", i.e. as a sqrt ( chi2 )!!

Definition at line 7 of file DeterministicAnnealing.h.

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Constructor & Destructor Documentation

DeterministicAnnealing::DeterministicAnnealing

(

float

cutoff = 3.0

)

Definition at line 13 of file DeterministicAnnealing.cc.

References temperatures.

Referenced by clone().

                                                              :
  theIndex(0), theChi2cut ( cutoff*cutoff ), theIsAnnealed ( false )
{
  temperatures.push_back(256);
  temperatures.push_back(64);
  temperatures.push_back(16);
  temperatures.push_back(4);
  temperatures.push_back(2);
  temperatures.push_back(1);
}

DeterministicAnnealing::DeterministicAnnealing	(	const std::vector< float > &	sched,
		float	cutoff = 3.0
	)

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Member Function Documentation

void DeterministicAnnealing::anneal

(

)

[virtual]

Implements AnnealingSchedule.

Definition at line 30 of file DeterministicAnnealing.cc.

References temperatures, theIndex, and theIsAnnealed.

{
  if ( theIndex < ( temperatures.size() - 1 ) )
  {
    theIndex++; 
  } else {
    theIsAnnealed = true;
  };
}

DeterministicAnnealing* DeterministicAnnealing::clone

(

void

)

const [inline, virtual]

Implements AnnealingSchedule.

Definition at line 51 of file DeterministicAnnealing.h.

References DeterministicAnnealing().

  {
    return new DeterministicAnnealing ( * this );
  };

double DeterministicAnnealing::currentTemp

(

)

const [virtual]

Implements AnnealingSchedule.

Definition at line 73 of file DeterministicAnnealing.cc.

References temperatures, and theIndex.

{
  return temperatures[theIndex];
}

double DeterministicAnnealing::cutoff

(

)

const [virtual]

Returns phi(chi2) / ( phi(cutoff^2) + sum_i { phi(chi2s[i]) } ).

Implements AnnealingSchedule.

Definition at line 68 of file DeterministicAnnealing.cc.

References funct::sqrt(), and theChi2cut.

{
  return sqrt(theChi2cut);
}

void DeterministicAnnealing::debug

(

)

const [virtual]

Implements AnnealingSchedule.

Definition at line 88 of file DeterministicAnnealing.cc.

References GenMuonPlsPt100GeV_cfg::cout, lat::endl(), i, and temperatures.

{
  cout << "[DeterministicAnnealing] schedule=";
  for ( vector< float >::const_iterator i=temperatures.begin(); 
        i!=temperatures.end() ; ++i )
  {
    cout << *i << " ";
  };
  cout << endl;
}

double DeterministicAnnealing::initialTemp

(

)

const [virtual]

Implements AnnealingSchedule.

Definition at line 78 of file DeterministicAnnealing.cc.

References temperatures.

{
  return temperatures[0];
}

bool DeterministicAnnealing::isAnnealed

(

)

const [virtual]

is it annealed yet?

Implements AnnealingSchedule.

Definition at line 83 of file DeterministicAnnealing.cc.

References theIsAnnealed.

{
  return theIsAnnealed;
}

double DeterministicAnnealing::phi

(

double

chi2

)

const [inline, virtual]

phi ( chi2 ) = e^( -.5*chi2 / T )

Implements AnnealingSchedule.

Definition at line 63 of file DeterministicAnnealing.cc.

References funct::exp(), temperatures, and theIndex.

Referenced by weight().

{
  return exp ( -.5 * chi2 / temperatures[theIndex] );
}

void DeterministicAnnealing::resetAnnealing

(

)

[virtual]

Implements AnnealingSchedule.

Definition at line 57 of file DeterministicAnnealing.cc.

References theIndex, and theIsAnnealed.

{
  theIndex=0;
  theIsAnnealed = false;
}

double DeterministicAnnealing::weight

(

double

chi2

)

const [virtual]

Returns phi(chi2) / ( phi(cutoff^2) + phi(chi2) ),.

Implements AnnealingSchedule.

Definition at line 40 of file DeterministicAnnealing.cc.

References phi(), and theChi2cut.

{
  long double mphi = phi ( chi2 );
  /*
  if ( mphi < std::numeric_limits<double>::epsilon() ) return 0.;
  return 1. / ( 1. + phi ( theChi2cut * theChi2cut ) / mphi );
  */
  // return mphi / ( mphi + phi ( theChi2cut ) );
  long double newtmp = mphi / ( mphi + phi ( theChi2cut ) );
  if ( !finite(newtmp ) )
  {
    if ( chi2 < theChi2cut ) newtmp=1.;
    else newtmp=0.;
  }
  return newtmp;
}

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Member Data Documentation

double DeterministicAnnealing::theChi2cut [private]

Definition at line 58 of file DeterministicAnnealing.h.

Referenced by cutoff(), and weight().

unsigned int DeterministicAnnealing::theIndex [private]

Definition at line 54 of file DeterministicAnnealing.h.

Referenced by anneal(), currentTemp(), phi(), and resetAnnealing().

bool DeterministicAnnealing::theIsAnnealed [private]

Definition at line 59 of file DeterministicAnnealing.h.

Referenced by anneal(), isAnnealed(), and resetAnnealing().

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

• RecoVertex/VertexTools/interface/DeterministicAnnealing.h
• RecoVertex/VertexTools/src/DeterministicAnnealing.cc

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