MultiGaussianState1D Class Reference

#include <MultiGaussianState1D.h>

Public Types
typedef std::vector< SingleGaussianState1D >	SingleState1dContainer

Public Member Functions
const SingleState1dContainer &	components () const
	access to components More...
double	mean () const
	combined mean More...
	MultiGaussianState1D ()
	MultiGaussianState1D (const SingleState1dContainer &stateV)
double	variance () const
	combined variance More...
double	weight () const
	combined weight More...
	~MultiGaussianState1D ()

Private Member Functions
void	checkCombinedState () const
	calculation of the combined state (on demand) More...

Private Attributes
SingleGaussianState1D	theCombinedState
bool	theCombinedStateUp2Date
const SingleState1dContainer	theComponents

Detailed Description

One-dimensional multi-Gaussian mixture: weighted sum of single Gaussian components.

Definition at line 12 of file MultiGaussianState1D.h.

Member Typedef Documentation

typedef std::vector<SingleGaussianState1D> MultiGaussianState1D::SingleState1dContainer

Definition at line 14 of file MultiGaussianState1D.h.

Constructor & Destructor Documentation

MultiGaussianState1D::MultiGaussianState1D ( )

inline

Definition at line 18 of file MultiGaussianState1D.h.

: theCombinedStateUp2Date(false) {}

MultiGaussianState1D::MultiGaussianState1D ( const SingleState1dContainer &  stateV )

inline

Definition at line 20 of file MultiGaussianState1D.h.

    : theComponents(stateV), theCombinedStateUp2Date(false) {}

MultiGaussianState1D::~MultiGaussianState1D ( )

inline

Definition at line 23 of file MultiGaussianState1D.h.

References mean(), variance(), and weight().

{}

Member Function Documentation

void MultiGaussianState1D::checkCombinedState ( ) const

private

calculation of the combined state (on demand)

Definition at line 27 of file MultiGaussianState1D.cc.

References MultiGaussianStateCombiner1D::combine(), theCombinedState, theCombinedStateUp2Date, and theComponents.

Referenced by components(), mean(), and variance().

{
  if (theCombinedStateUp2Date) return;

  MultiGaussianStateCombiner1D combiner;
  theCombinedState = combiner.combine(theComponents);

//   typedef SingleGaussianState<1> SingleState;
//   typedef std::shared_ptr< SingleGaussianState<1> > SingleStatePtr;
//   typedef std::vector< SingleStatePtr > SingleStateContainer;

//   SingleStateContainer components;
//   for ( SingleState1dContainer::const_iterator ic=theComponents.begin();
//  ic!=theComponents.end(); ic++ ) {
//     SingleStatePtr ssp(new SingleState(SingleState::Vector((*ic).mean()),
//                     SingleState::Matrix((*ic).variance()),
//                     (*ic).weight()));
//     components.push_back(ssp);
//   }
//   MultiGaussianState<1> multiState(components);

//   theCombinedState = SingleGaussianState1D(multiState.mean()(0),
//                     multiState.covariance()(0,0),
//                     multiState.weight());

  theCombinedStateUp2Date = true;

}

const SingleState1dContainer& MultiGaussianState1D::components ( ) const

inline

access to components

Definition at line 32 of file MultiGaussianState1D.h.

References checkCombinedState(), and theComponents.

Referenced by MultiGaussianStateCombiner1D::combine(), GaussianSumUtilities1D::components(), and MultiTrajectoryStateMode::momentumFromModeP().

{return theComponents;}

double MultiGaussianState1D::mean

(

)

const

combined mean

Definition at line 15 of file MultiGaussianState1D.cc.

References checkCombinedState(), SingleGaussianState1D::mean(), and theCombinedState.

Referenced by GaussianSumUtilities1D::computeMode(), GaussianSumUtilities1D::mean(), and ~MultiGaussianState1D().

{
  checkCombinedState();
  return theCombinedState.mean();
}

double MultiGaussianState1D::variance

(

)

const

combined variance

Definition at line 21 of file MultiGaussianState1D.cc.

References checkCombinedState(), theCombinedState, and SingleGaussianState1D::variance().

Referenced by GaussianSumUtilities1D::computeMode(), GaussianSumUtilities1D::variance(), and ~MultiGaussianState1D().

{
  checkCombinedState();
  return theCombinedState.variance();
}

double MultiGaussianState1D::weight

(

)

const

combined weight

Definition at line 5 of file MultiGaussianState1D.cc.

References mps_fire::result, theCombinedState, theCombinedStateUp2Date, theComponents, and SingleGaussianState1D::weight().

Referenced by GaussianSumUtilities1D::computeMode(), GaussianSumUtilities1D::weight(), and ~MultiGaussianState1D().

{
  if (theCombinedStateUp2Date) return theCombinedState.weight();
  
  double result(0.);
  for ( SingleState1dContainer::const_iterator ic=theComponents.begin();
    ic!=theComponents.end(); ic++ )  result += (*ic).weight();
  return result;
}

Member Data Documentation

SingleGaussianState1D MultiGaussianState1D::theCombinedState

mutableprivate

Definition at line 41 of file MultiGaussianState1D.h.

Referenced by checkCombinedState(), mean(), variance(), and weight().

bool MultiGaussianState1D::theCombinedStateUp2Date

mutableprivate

Definition at line 42 of file MultiGaussianState1D.h.

Referenced by checkCombinedState(), and weight().

const SingleState1dContainer MultiGaussianState1D::theComponents

private

Definition at line 40 of file MultiGaussianState1D.h.

Referenced by checkCombinedState(), components(), and weight().