lsst::meas::algorithms::MinimizeChi2< PixelT > Class Template Reference

Inheritance diagram for lsst::meas::algorithms::MinimizeChi2< PixelT >:

Public Member Functions
	MinimizeChi2 (evalChi2Visitor< PixelT > &chi2Visitor, afw::math::Kernel *kernel, afw::math::SpatialCellSet const &psfCells, int nStarPerCell, int nComponents, int nSpatialParams)
double	Up () const
	Error definition of the function.
double	operator() (const std::vector< double > &coeffs) const
void	setErrorDef (double def)

Detailed Description

template<typename PixelT>
class lsst::meas::algorithms::MinimizeChi2< PixelT >

Definition at line 544 of file SpatialModelPsf.cc.

Constructor & Destructor Documentation

MinimizeChi2()

template<typename PixelT >

lsst::meas::algorithms::MinimizeChi2< PixelT >::MinimizeChi2 ( evalChi2Visitor< PixelT > & chi2Visitor, afw::math::Kernel * kernel, afw::math::SpatialCellSet const & psfCells, int nStarPerCell, int nComponents, int nSpatialParams )

inlineexplicit

Definition at line 546 of file SpatialModelPsf.cc.

            : _errorDef(1.0),
              _chi2Visitor(chi2Visitor),
              _kernel(kernel),
              _psfCells(psfCells),
              _nStarPerCell(nStarPerCell),
              _nComponents(nComponents),
              _nSpatialParams(nSpatialParams) {}

Member Function Documentation

operator()()

template<typename PixelT >

double lsst::meas::algorithms::MinimizeChi2< PixelT >::operator() ( const std::vector< double > & coeffs ) const

inline

Definition at line 566 of file SpatialModelPsf.cc.

                                                             {
        setSpatialParameters(_kernel, coeffs);
 
        _psfCells.visitCandidates(&_chi2Visitor, _nStarPerCell);
 
        return _chi2Visitor.getValue();
    }

setErrorDef()

template<typename PixelT >

void lsst::meas::algorithms::MinimizeChi2< PixelT >::setErrorDef ( double def )

inline

Definition at line 574 of file SpatialModelPsf.cc.

{ _errorDef = def; }

Up()

template<typename PixelT >

double lsst::meas::algorithms::MinimizeChi2< PixelT >::Up ( ) const

inline

Error definition of the function.

MINUIT defines Parameter errors as the change in Parameter Value required to change the function Value by up. Normally, for chisquared fits it is 1, and for negative log likelihood, its Value is 0.5. If the user wants instead the 2-sigma errors for chisquared fits, it becomes 4,

Definition at line 563 of file SpatialModelPsf.cc.

{ return _errorDef; }

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

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-9.0.0/Linux64/meas_algorithms/g1a0ca8cf93+bf6eb00ceb/src/SpatialModelPsf.cc